Your condition is so good, I suggest you go to the gym to practice with a fitness instructor for a while if you have the conditions, and then you can exercise at home after mastering the essentials. This will not only ensure your effective exercise, but also be safer (sometimes improper exercise will strain your muscles), otherwise your muscles will be ugly ~ If you have to practice by yourself, there are many fitness methods on the Internet, so you can search them.
I wish you success ~
Answer according to your supplementary question: Personally, I don't think you are fat, but you will look good if you train fat meat into strong muscles. Rain is 150 kg, you can measure it yourself ~ As a girl, I hate boys who look as fragile as color photos anyway, but prefer tall and strong ones. You can also send a photo, and we will help you consult, haha ~