CC changed the way I train, not only in terms of techniques but also the freedom of being able to train anywhere, anytime, with no equipment.
In terms of strength, since combining CC with my kettlebell routine I am at my all time strongest. If you train right and train hard then your strength will improve, not diminish. I have also put on a couple of kg of muscle.
I always recommend to my clients and friends who are starting body weight training to start at the beginning. You wouldn't start anything else halfway through, so why CC? The lower steps are used to strengthen the joints and connective tissue as much as the muscles, don't avoid them. Get out of the mind set of 'which is the hardest one i can do and how soon can i move on to the next?' and try and get all the benefits you can out of each step before progressing. This way you will progress much better and won't get stuck on a certain rep/set as much.
Good luck and let me know how it goes!
Ben Mattingly RKC
Train Hard or Go Home
CC Progress: Push Ups - 8, Pull Ups - 7, Squats - 7, Leg Raises - 2, Bridges - 3, Handstand Push Ups - 3, Clutch Flag - 5, Grip - 2