You can hypnotize yourself, and you don't have to find someone to help you. That's just a psychological effect. If the other person claims to be an expert, you will feel that he is very strong and will be easily hypnotized by him.

You can relax before going to bed, don't do too much exercise and don't eat too much.

Lying in bed, slowly imagine your fingers in your mind, and then relax your toes (imagination is the main hint).

While thinking, slowly realize and feel. If you really feel a little relaxed, go up to your arms, calves and thighs.

Finally, relax all over, and then slowly, try to make your mind think nothing, try to relax your brain and let yourself relax completely.

Usually when the body is completely relaxed, people will become very weak and their brains will be relatively groggy.

If you can, you'd better listen to some light music and have a little confidence in yourself. I hope you can sleep well.