The best way is to go through a free educational program for beginners 100-day workout - http://workout.su/100;) There you will receive all the necessary basic knowledge and acquire a certain level of physical. preparation.
Find a horizontal bar (crossbar) and bars
Find like-minded people with solid workout experience (this is best done in summer)
Watch video lessons with street gymnastics professionals (Denis Minin, Mikhail Bashkatov)
Sign up for the artistic gymnastics section. This will provide a solid base for further exercises on the horizontal bar.
Is it better to focus on one thing and do exercises for one muscle group, or does he approach the issue in a comprehensive manner and a little bit for different groups?