First of all, you should face up to your figure. If you have a good figure, thin legs and a thin waist, then I don't think you need to be shy. Wear whatever you want, just find your own style. If your upper body is fat and your lower body is thin, try to choose a loose coat and cover all the meat on your arms, so that your lower body can be paired with tights or shorts skirts. Such a combination, others' eyes will all shift to your lower body, and you will naturally not notice the defects of your upper body.
There are also some girls who have thin upper bodies but thick legs. If that's the case, you should choose loose pants with a tight coat, and casually wearing a thin coat is very sexy. I've seen a lot of street shooting before. Many stars have used tube tops with denim jackets, and the lower body is very casual loose jeans. This kind of collocation shows the material of the upper body well, but at the same time it covers up the defects of your lower body without trace, and it is a little sexy and won't make people feel deliberate.
Sometimes, the simpler you wear, the more you can match the surprise. Therefore, when you first learn to match, you should try to make simple items colorful, instead of touching too complicated things as soon as you learn to match. If you have too many elements on you, it's actually not so beautiful.