How to masturbate properly

Hey all!

Do this probably sounds dumb. Especially since I’m nearly 20 and sexually active. My bf and I have great sex but I have never come. Everywhere on the internet says that the first step to orgasm w a partner is to learn what you like by masterbating. I have never really tried much, mostly because I feel like I just get tired.

I don’t have access to sex toys or a shower head, which I know is what most people seem to use

For those of u who just use your hands, what techniques do you suggest?

Please feel free to do as much tmi as possible. I feel very uneducated on the matter and want as many tips as possible.

Thanks ladies