[infinite_luck]

Like the others have said, the bodyweightfitness subreddit is a great resource. I just want to stress if/when you get to using gymnastics rings, don't just jump right into them, be very careful with your form. Also be sure to that you have not progressed too quickly and are actually doing the exercises you should be doing for your strength level. I've injured myself on them multiple times (the first time I was just doing something dumb) and I'm currently on the tail end of the recovery of another injury. I would imagine this just has to do with the fact that each ring is independent of the other, with many free degrees of movement, which makes it easier to slip into form that is bad on your body. That being said, I love body weight training and starting it was one of the best decisions I've ever made.