Just look at the long distance, especially the difference between marathon runners and short distance runners. The former has particularly thin legs, while the latter has particularly developed muscles. So my advice to you is.

Keep running for 40 minutes to 1 hour every day. You can't run fast. If you run fast, your legs will lean towards that kind of athlete. You can think about it.

Stick to it for at least 3 months. Running is based on jogging and sweating, and there is no hard distance or time. It's hard to sweat if you don't run enough when jogging.

The most important thing is persistence. Without persistence, all weight loss is nonsense.