Follow your instincts, little one.. you are safe behind the PC and no-one will judge you as your persuits here on the web are private (to an extent)..
If you need to ask then "how" to enjoy it, then 'it' is not for you..
I was never able to achieve orgasm (via sex w/ another person.. I've been masturbating since 8.. *evil grin*) until I confronted the darkest parts of Myself.. Embracing them and sharing with the right people set Me free..
I suggest reading some text-based erotica, a plethora of which is available on this site..
What turns you on..? What ideas brought you to this conclusion..?