Self pleasure

So I’ve been struggling for a long time with sex . Or the nature of sex actually. I dont have any toys but I’ve been masturbating for a long time. Im 18 now. All I’ve ever done was rub my clit and within 3 minutes im finished. I’ve tried fingering myself and they didnt help.. I’ve had sex and that didnt help. I can only orgasm when coming in contact with my clit. I wanna be able to last longer and orgasm many other different ways besides the clit.. can anyone help