How do I do this if I don’t have any partner?

If you can move your limbs, its just numbness and not sleep paralysis.

Why do you need sleep paralysis? It is not necessary to astral project. You can astral project even without sleep paralysis. Please follow the exact steps written above and you should be able to astral project easily.

I created an account just to thank you man your this trick it's truly amazing! And you can easily teach it to people (I'll try with my girl)