If you want to be able to handle them, I wouldn't get 4 at once as you will already have a hard enough time with one (just because you are new to birds) and if you get a group at the same time, they will be even more difficult to bond with (they tend to form a flock/bond with the other birds).
Also, I always feel like I have to warn new members about some dangers that they may/may not be aware of (especially since you didn't plan on owning a bird).
If you already know all of this, ignore it, but here are some things I didn't know until I had a bird of my own. AGAIN..I always feel the need to volunteer this information, as it is not common knowledge to most non-bird owners and it can make the difference between life and death. Here we go
Pretty much anything with a scent shouldn't be used around your bird (no candles (scented or unscented-- it doesn't matter if they are "organic" etc-- they are still bad for their lungs), air fresheners (Fabreeze or car fresheners/oils/tags etc), perfumes, hairsprays, carpet shampoo, oil diffusions, spray-on deodorant, sharpie markers, hot glue guns, paint, shoe polish, nail polish, nail polish remover, cigarettes, BBQ grill smoke, bug spray, insecticide, burning food- esp smoking oil/butter etc etc)
Everyday household cleaners, such as Bleach, Lysol, Windex, Kaboom etc are also terrible for birds (their respiratory systems are SUPER sensitive compared to mammals). The only safe cleaners are vinegar+water, baking soda+water (on home surfaces), water+ grapefruit seed extract and/or avian safe veterinary cleaners/disinfectants (such as F10 SC). Do not ever mix something like vinegar+ water with an avian safe cleaner, as this can lead to unexpected chemical reactions.
Teflon/PTFE/PFOA is very very dangerous and it hides in things like ironing board covers, irons, curling irons, drip trays, bake-in-a-bag meals, space-heaters, self-cleaning ovens, some microwave popcorn bags, blow-dryers, curlers,toasters, rice-cookers, air poppers/fryers, humidifiers etc. If a product heats up, it often contains internal or external parts coated in teflon and this can be in the form of a clear-coat. Most people assume it is just in kitchen pots and pans, and while it is common there, it is in many other unexpected (and invisible) places as well.
If you haven't already, find a certified avian vet (CAV). Birds hide illness like crazy (because it would get them killed in the wild if they showed weakness). This means that by the time you notice symptoms, things are getting pretty bad. Tail-bobbing/pumping is a sign of breathing difficulty. Look out for that, as well as any sounds when breathing...Nares and vent (butt) should be free from discharge/waste. Google images of bird poop, because you will want to always check out your bird's droppings for health (There are 3 parts: 1. urates should be white, 2. fecal matter can vary in color but there are certain colors to look out for, and then there is the urine (3) which should be clear). Overly runny or bubbly poop can also signal problems. Finally, If a bird is hanging out on the bottom of the cage for no reason (E.G., not playing or destroying something) it is a SERIOUS emergency.