Not new but looking for MORE SUPPORT!!

I'm much older than you (48) and have dealt with knee injuries since 15. I encourage you to give your injury time to heal. Contrary to the opinion of some, pain is not a sign of weakness, it usually means something is wrong! Basically everything you listed is not advisable in my case, I do find that I can modify an exercise routine to reduce the things that cause me the most problems. I avoid anything that requires running, jumping, balancing on one leg, twisting, rapid position changes (like step class) or long sessions doing the same thing (treadmill). What I can do: treadmill with no incline for short time periods, some biking, walking (my stride is short, trouble happens with long strides), some exercise routines (heavy on the floor work) and swimming. I can participate in some classes but I modify my moves if a particular move is not good, I may walk in place, do low kicks or knee raises instead of things like jumping jacks. I try to find some small ways to add some calorie burning without risking injury; yard work and mowing the lawn. The key is to watch balance and not overuse the knee to a point where you risk a fall or further injury. I am not a professional athlete so I don't earn my living pushing my body to the limit. I have to be able to work, maintain a home and live with these knees and my friend, athritis. It's really ok with me that I can't do all the moves in the latest burn, shred and get ripped video, my goal is to be able to perform normal daily activities, remain pain-free and have a reasonable degree of fitness given my limitations.Talk with your orthopedic or sports med doc about what is advisable for you with your injury. I wish you a speedy recovery!