In summer and autumn, wearing a short skirt or a simple dark knee-length dress and girding your waist can not only make you slim, but also cover your fat ass and thighs. You can also wear clothes with loose upper body and tight waist. If you find a good one, it is really omnipotent. Wear cropped trousers or knee-length trousers (white. Black. Dark colors are ok)
You can also wear skirts and pantyhose with boots in winter. You can boldly try clothes with a U-neck and wear a silk scarf (as simple as possible, not too fancy). If your skin is white, you can also challenge bright clothes (bright yellow, etc. There is also a long dark windbreaker or coat that can also modify your figure.
It is difficult to wear clothes in spring. I usually wear a pure white shirt or a red plaid shirt, dark jeans, simple and frank.
In fact, the most important thing is to be confident, smile more and always tell yourself that I am beautiful. As for dressing up, you can read magazines. Go to a boutique, and they will usually tell you how to match it.
Don't take my words to Doha, I hope it will help you a little.