Masturbation techniques?

Hey! :) I'm a girl, 17. I started masturbating when i was like 15. It feels sooooo goood. I'm still a virgin and my BF wants to have sex but i wanna wait a lil. I wanna know if there are some masturbation techniques.. The way i masturbate is in the bath. I open my legs and put my vagina down the faucet and with my hands i touch my boobs. i moan sometimes.. and i do it 30 min a day.. 4 times a week or when i have time. thanks!