Budgie birds should not be kept in direct sunlight. Always place his aviary in a shady spot.
The best way to get a Budgie is to adopt one or from hand feed breeders. I made an article related to this topic you should check it out here
It really depends is your both budgies female? How to stop a Budgie from biting you can read here If they are fighting all the time and hurting each other, you should separate them.
Taming a Budgie bird or any kind of pet really depends on your patients and their will to be tamed. Some pets really don’t want to be tamed and have some kind of trauma from the past. For those kinds of pets, you need a lot, a lot of time to tame and gain their trust. There is an article about taming a bird here or even a Youtube playlist of videos on how to tame a budgie bird here.
I am so sorry and I am glad that this budgie found a great owner as you are Lauren. You need to provide that budgie his own unique cage for non-flying Budgie so he can’t hurt himself. Food dishes on the ground and water. You need to be his eyes and his beak. All you can do is to be a great bird parent as you already be and spend so much time with him. Thank you for taking care of that little one 🧡
Why veggies? Better health, longer life, variety in the diet, etc. Some Random Ideas to get your Bird to eat veggies or fruits Watch here