Welcome to the world of bunnies.
I understand that spaying is very costly, but it is sort of necassary if you want your bunny to live a long healthy life and be less aggressive.
As for the pellets, if your rabbit is eating both kinds of pellets than it should be fine. But NEVER feed your bunny any kind of mueseli mix with nuts ,dried fruits etc. your rabbit will eat all the sugary bits and live the healthy bits. I highly reccomend Oxbow T adult rabbit food.
Your rabbit should eat her body size in hay each day (at least).
For vegetables, go to the house rabbit society and they have a bunch of information on the correct diet for your rabbit. They also have a bunch of other stuff that you should know. My rabbits (2 rabbits) get 3 cups of veggies in the morning and the evening with a mix of romaine lettuce, parsley, cilantro, kale, collard greens, and sometimes a baby carrot.
You don’t need to feed your rabbit treats every day though. Once a week usually on saturday my rabbits get a few pieces of apple, bannana and strawberry.
Also, make sure your bunny has really soft bedding as to prevent sore hocks.
Agility is also fun to do with your rabbit but never force her to do it.
Sorry this is so long
Have fun with your bun!!!!!!!!