Hello, and welcome!
You found a great place, and I'm glad you did.
I know you'll learn AND contribute a lot.
Ummm... for example... I can't wait to see photos of your birds!!!
By the way... some thoughts on multiple birds...
Fortunately (unfortunately?) the Rb is so aggressive and territorial that I've never even dared to think of another bird...
Many here have found that they have to separate birds permanently... some have been fortunate and multiple birds get along.
You just never know! Never, ever.
Good for you for being so responsible and serious, and for reaching out!
I think that as long as you're willing to deal with whatever happens (e.g., separating them, if needed, handling added expenses, etc.), you sound like a great parront.
Good luck!
Keep us posted, please.