Vibrators? tips tricks and advise?

Back story: my mom and i had "the talk" and she bought me a vibrator she believes that if i masturbate then i wont have premature sex (im 13) i know how to turn it on and stuff but how do i use it like i can change the speeds but what do i do with it its a long purple rod with a flat angled tip that flattens out like a pancake (it doesn't move) its not for penetration so any tips tricks and advise would be nice because it would be kinda awkward to go to my mom and say "Hi mom how are ya? that's great. how the hell do you use this thing?!?!?!?" lol thanks for your help