There are three things that are most important in dancing. Before you dance, you must prepare...
<This is a necessity for all dancers, whether they are beginners or masters>
1 mirror. A mirror that can see your whole body and help you correct your mistakes. Improve the sense of dance... A lot of beginners think that dancing is just a matter of following the beat and doing the moves. It's just a matter of following the beat and doing the moves. But it's not. If you want to dance well.. You must have a mirror. Otherwise. After you've made your mistakes. It will be hard to correct them...
2Music... Remember that no matter what kind of dance you do.. Be sure to turn the music on. Don't treat dancing like doing radio gymnastics... It's not just a matter of doing the moves. Even if you don't know how to dance... Let your body interact with the music. It's a habit. Slowly learn to catch the beat and drums.
3 The more appropriate clothes... No matter what kind of dance you learn. You have to learn to have the equipment of the dance... For example, if you learn street dance jazz and reggae. Then you have to have the upper body tight lower body wide clothes and pants. If you want to learn breaking, you need a knee brace to protect your body. If you want to learn house, you need good shoes. It's hardwearing.
In fact, before learning to dance, you first need to find a teacher to teach you the basics. If you have the talent, you can do it in 3 or 4 months, and then practice at home.
There are a lot of videos on the Internet that teach dance. You can see a lot of them, a lot of basic instruction, but no matter what. But no matter what, you have to do the first 3 preparations. The handmade really tired, hope to adopt, by the way, as you said the body stiff. You need one of your classmates to help you open your back and shoulders.. Lower your legs. Stretch the ligaments. 2-3 times a week. The flexibility of the dance will help a lot.