Acl injury...what to do?

If you can afford a gym membership then you should be okay. Start out by riding the stationary bike. Then I would go through an ortment of leg exercises. At this point you really need to strengthen your hamstrings they will compensate for the lack of strength in your quads. Also do single leg press on the squat machine. Don't do too much weight and focus on completing about 20 repetitions per set. I would do three 3 sets for each exercise. Ideally you should work out for about an hour a day 4 times a week. I would also stop running in the mean time and start participating light impact cardio. You can ride the bike, use the elyptical, go swimming, ect.