Masturbation/orgasm help!

I need help! I’ve been struggling to find a way to masturbate that gets me to orgasm. I’m not sure if I’ve ever orgasmed before, but I don’t think I have.

I’ve tried fingering myself but that doesn’t do so much and my hand gets tired after a while.

I’ve used a shower head on my clit and that feels great but there’s no growing feeling or building sensation. It just kinda feels good and then nothing happens.

I’ve also tried using a hairbrush handle (with a rubber glove over it for sanitary purposes) in place of a dildo but that also doesn’t do much.

Any suggestions?