My advice from my own personal ACL experience and a bad ankle.
Spend TIME in the gym, and TIME in a dynamic environment (track & field). Long term, consistent planning is KEY. Build a foundation, don't try to reclaim past glory too quickly or try to gain improvements too fast. Be PATIENT.
Incorporate into your training the following for your knees:
Peterson Step Ups
Rock Bottom Squats with light weight initially.
Variety of Deadlift movements
Sgl leg calf raises.
Sgl leg exercises for squats
A plethora of movements (variety) for assistance exercises.
***Resistance band adduction, abduction, posterior raises, anterior raises and using a "knee chamber or rechamber" as part of those movements.
Isometric holds on leg extension machine. (Can't believe I just recommended that)
Agility training using cones. Sprints from 10yards to 440yards. Low impact plyometrics.
Use a rotation of higher reps to low reps via a weekly routine for the main lifts. Week 1 10-12, Week 2 8, Week 3 5, Week 4 3-4
Proper warmup, massage, stretching, and good shoes.
Eat clean, plenty of protein, etc. etc.
I did, still do, 2 weeks of high volume (lots of activity) followed by higher intensity lower volume for 2 weeks. Example, lots of assistance exercises, bike intervals, etc. the 1st two weeks, 2nd two weeks I do goal achievement training, higher weights, plyos, and generally rest more. Has worked real well taking me from rehab back into the competitive field of play.
For my ankle, I just listen to it. IF its getting weak, I let it rest. When it feels ok, I push on it good. Make sure you wear good shoes for the purpose.
Hope there is something in there you can use.