Is it normal to not know how to masterbate?

You don't have to "stick anything in there" to masturbate. Simply touch yourself in the ways that feel good to you. There is no manual for masturbation.

There's no certain way.

Don't stick anything in there! Unless you want an infection. And wash your hands before you touch your vag too.
Try touching yourself in shower or bath. Rub your clit if you are having a hard time getting turned on. It's the wierd bump thing at the front center of your vag.

It's not all about putting things up there, just rubbing with your fingers against your clit and vulva etc. is masturbation.

Try touching your breasts before touching down there as well and try to figure out what feels good to you.

As randomjelly said, there's no manual to masturbation.

ima a dude and have seen my girlfriend do it
1 start with something small like a sharpy not cap side
2 my girlfriend rubed it on her clit
3 enter the sharpy into clit o ya the clit is the vagina keep doin it
when u feel good ur bout to squirt
and dont stick something in ur ass

Same....ive tried but never actually got past the point of it just feeling good....