Orgasm PLEASE

Does anyone have a method that would get me through to an orgasm? I’ve tried a lot of different things, and the thing that’s worked best is shower head on my clit, but I’ll get super close and then it’ll stop and I’ll be frustrated. Sometimes the feeling is just so intense I can’t bear it, but I’ve never been able to make myself cum. I’m asexual, and the idea of sex terrifies me, but I’d still like to know what an orgasm feels like. I mean I’m 17, I should know by now lol