How to get a great orgasm?(girl)?

Im a teenage girl who masturbates with a hairbrush handle while rubbing my clit..I can get really close to a climax but can never get there no matter how long I do it for...i am a virgin and can't get any sex toys...I've heard if using the tub water focit but mine is really powerful and I'm scared it might hurt....please help!! :) give me descriptive answers please!!! :)