WOAH...you dove straight into the deep-end of the pool....I don't know about hand-feeding, but I do know about birds. You will need to focus on hand-feeding for now, as that is a major undertaking...
Here are some thoughts I posted for someone who was considering adopting a bird--I know you already have, but it can't hurt....This excerpt was for a Macaw, but minus the parts on costs, it applies to all parrots (except for birds like eclectus who have weird dietary needs). I pasted it below:
"Other thoughts for a 1st time owner:
You will need to establish a set bedtime for either bird, which means being home to cover them at night and waking up to uncover them in the morning. They need 10-14 hours of uninterrupted sleep.
Baby birds are 100% sweeter than adults and their personalities and preferences change significantly at puberty. Many bad habits that people start with babies (like stroking and cuddling/playing in blankets etc) can create complete hormonal monsters as adults. A bird should only ever be petted on its head or neck and it should never be given access to shadowy/dark spaces (huts, tents, boxes, tubes, under furniture etc)
Also, all of your cleaning routines will have to change, as you cannot use any chemical cleaners in the same house with a bird unless they are certified avian safe (e.g., F10 SC), or some natural cleaners, such as unheated vinegar+water, water+grapefruit seed extract, baking soda+ water etc....NO bleach, no ammonia, no lysol (the list goes on). Aerosols, perfumes, scented lotions, paints, polishes, stains, solvents, glues (hot or other), candles (scented or non), scented oils, air fresheners, carpet cleaners, bug sprays, flea baths, smoke of any kind, vaping, potpourri, burning food.butter/oil etc are all absolutely unsafe for bird's very sensitive respiratory systems.
Most things that you wouldn't even consider kill birds. This includes Teflon/PFOA/PTFE (hidden inside of metal appliances that heat up and on/in cookware/sow cookers etc. It is seriously hidden in many many places (space-heaters, curling irons, blow dryers, air fryers, rice cookers, electric blankets, microwave popcorn bags, fabrics (including ironing board covers), irons, griddles, humidifiers etc etc etc. The only way to know if a product contains Teflon/PFOA/PTFE is to call and expect to wait a few days for a response. You will need to give the customer service agent the full names and abbreviations of each (Teflon is a common brand, but the chemicals are PTFE/PFOA) You cannot detect it visually and walls/floors/doors do not protect a bird from the fumes released when heated. If getting a bird, you may not use it in the same house....It takes as little as 5 minutes of exposure to kill a bird and there is no cure for PTFE/PFOA/Teflon poisoning... So, when visiting people's homes, if you plan to bring your bird or have someone sit your bird, they will have to follow all of these rules as well.
Birds hide illness as well, which means that you need to take them to the vet before major symptoms show up (it is like a science...) This means watching their poop and behavior constantly and researching the most minuscule signs of illness.
Furthermore, birds can spread disease without showing symptoms (many of which are deadly and testing for these diseases is difficult, as a negative test can be produced by a contagious bird..plus, most people don't test birds for things like PBFD or PDD until they see symptoms). This means that boarding your bird or exposing your bird to other birds (or even their dust) poses risks to your bird, as well as the others. 2 of the most deadly viruses (PDD and PBFD) can be carried by birds with negative test results and they are spread by feather dust, poop, mother-egg and saliva. The PBFD virus can survive in air-ducts etc and infect birds years later. I say this because buying toys from a store that houses birds poses a risk if you cannot wash them, as does boarding your bird or arranging bird play-dates. If you handle another bird, you should not even wear those same clothes when handling your bird unless you are 500% sure that they have been repeatedly tested for viruses and that they do not frequently get exposed to other birds (as incubation time for some can be as little as a few weeks and as long as 10 years).
Birds cannot safely chew on most woods or metals (even though they need to chew on wood to stay healthy, it has to be the right type). Copper, zinc and lead toxicity is very dangerous and many items within your home (such as money, jewelry etc contain these metals). Wood from a hardware store is also unsafe for birds, as certain woods are poisonous. I mention this because Macaws are basically beavers with wings so it would be tempting to find cheap sources of wood...All lumber/plywood has been pressure-washed and treated with chemicals to prevent insects and increase shelf life. Ply-wood etc and hardware store wood is not bird safe. Furniture and other wooden things around your home can contain toxic wood and chemical stains. Branches from your yard are likely unsafe as well, as they absorb chemicals for pesticides, insecticides and road run-off and can carry parasites and bacteria. They can be used if you are certain that the wood itself is non-toxic and if you can verify that the tree was never treated with any sort of insecticide, pesticide or growing in a place near a road where chemicals or winter salt from the roads could have been absorbed into it. If all of this checks out, then you will need to wash/scrub them (without using chemicals) and bake them in your oven at 250 F for about an hour in order to kill the potential viruses, bacteria, parasites and fungi that inhabit cut wood.
When selecting pre-mixed foods for your parrot, get one without sunflower seeds (only ok for occasional treats in extreme moderation), peanuts (they harbor a fungus in or out of the shell) and no corn (filler/junk). Your parrot will need a mix of pellets and a few healthy seeds."
today.It is around 1.5-2 months old.The shopkeeper told me to handfeed it smashed boiled lentils 3 times a day,once around 8am in the morning ,once around 1.30 pm in noon and once around 6 pm in the evening according to my time zone.
