If you practice yoga, you'd better sign up for a yoga class and get started first, because you still can't do many moves and don't know how to do them because you learn online or buy books. The most important thing is that yoga depends on breathing. So find a teacher to teach first, and then you can practice by yourself every day. Yoga will greatly improve your figure and temperament.
The stomach is thin, and it is said that sit-ups are very good. If you have thin legs, there are many thin legs in yoga, but it is very tiring to persist.
Note: Never go on a diet to lose weight. You have grown taller in recent years.