Trying to orgasm

Hey so I’m 17 and a virgin so masturbating is really the only way I can pleasure myself until I get a boyfriend...and I have never been able to reach an orgasm, I’ve tried stimulating my clit, fingering, even a shower head and I always start to build up a feeling but it always goes away and I never really orgasm so I’m always left with wanting more..any tips? (Also I can’t get any toys and don’t really have anything at home to substitute one)