I'm a little fat. I want to run to lose weight, but I'm embarrassed to meet others when I run. How to overcome this psychological barrier?

Whatever you do, you should hold your head high. If you're embarrassed, you'll keep getting fat! Running is nothing to be embarrassed about. It will be awkward at first, but everything is difficult at the beginning. As long as you run, it will be OK in the future! Run, son, not for others, but for yourself! When running, the only thing left is persistence!