First bird!

I'm picking up my first bird this weekend. A 10 year old female galah/rose breasted cockatoo.

Any tips, tricks, or advice for me? Are there any treats you recommend picking up or foods you recommend? (she's on a seed mix/pellet combo right now, and I know that's not ideal)

I've of course been doing research, but hearing from firsthand experience is always a bonus in my book.