Ground work, walk, trot, canter, transitions, to carry the saddle, to jump while on the lead rope, lateral movements... a lot.
I would suggest looking at the Parelli Level 1 it has an extended program for working on the ground and it will be a smooth transition to riding her.
parrelli natural horsemanship helped me train my horse who i had since he was born
Ground manners are a must
Also, working in different areas - arena, paddock, etc.- getting her to listen and focus on you in different situations through groundwork. Lots of feet picking, ear touching.
You can teach her how to yield her hind quarters and shoulders - getting used to giving to pressure and body language. Get her out on the lunge line... but you don't have to lunge her, might be too much strain on her limbs. Getting her used to blankets, saddle pads, saddle, bridle, bit, etc. You can look up in-hand "courses" where you set up a bunch of obstacles(barrels to weave through, pool noodles, tarps). You can work on suppling her head with just a rope halter, and once she's comfortable with the bit you can get her to start giving to pressure with that- getting her to follow the bit down. There is a lot. Check out David Archer or Jonathan Fields for the hind-end/shoulder yielding, and maybe Art2Ride for head/mouth/body supplying etc.