Sonny, is really doing great. And all my parrots try to eat anything I have. Luckily there is a lot of food I can share.
I don't know if I said this before, we consider bites as our fault, and work from there. If you get bitten it's your fault, and yes they always have a reason. We hear all the time people say they get bit for no reason, and that's just not true. Your getting bitten because you are not paying attention to their body language, or other reason. Anyway that mindset will help. Birds communicate with pupil size, feather positions , feather level fluffy, tight to body, head positions, wing positions, tail wags, tail flare, crouching. Sylized stretching and wing shrugs are a way of say hello.
Treat him as an intelligent individual, more do than a pet.
talk to him and explain things, it really goes a long way to make things easier.
Give him his own " furniture " to hang out on. It helps them to have a few spaces near you, that are their place, with things to destroy instead of your things. There are metal stands that you can attach those spiral ropes or hoops. I use ceiling hooks and fishing line to hang perches down next to my chair, at the breakfast bar. By a window. Make use of the space above your cage too. As well as lots of perches on the top and sides of your cage on the outside. Parrots like to leap from perch to perch, climb. Swing, test their skills. I shared photos in another thread I will link .
Chop sticks make great target train sticks, and Parrots catch in quick. But very short training sessions, like 3 reps, then 20-25 min before you go again.
Offer baths in large serving dish or casserole dish, about 1 inch of water, they don't like deep water. Splash around with your hand and he should come running to jump in. Or a spritz bath, font spray right at them, instead spray up and let the water fall fine on them. I let mine choose when they want a bath. I putb out fresh warm water 2 times a day and see if they want to take a bath.
As you are making friends with Sonny, say hi to him a million times a day and just give a safflower seed, a tiny piece of cracker, some small tid bit. Birds understand using good gifts to make freinds, and it works.
http://www.parrotforums.com/conures/88174-he-has-wings-full-flight-feathers-so.html