FIRST, PRACTICE THE BASICS
Calisthenics basics are pull-ups, push-ups or exercises that focus on the core. If you feel like normal basics are too boring for you, you might want to start with some easy skills.
SECOND, FIND A GOOD SOURCE OF KNOWLEDGE
i.e. a professional coach or someone with a lot of experience. There are many good calisthenics bloggers on the internet. Do not let yourself confuse by the variety. Find one or a few good sources of knowledge. Remember, just because someone is a good athlete, this doesn’t mean that the same person knows how to give advice!
THIRD, DON’T COMPARE YOURSELF WITH OTHERS
… because normally their background story is a different one than yours. The more time you spend with envying other people’s progress, the less time you have for your own progress.