Your clit is at the top of your vulva.
Above your vagina is your urethra, from where you pee. Above that is your clitoris (clit). (It is the female equivalent to the male penis, but without a pee-hole) It is covered by a hood. Your clit is a very sensitive organ and the primary source of your sexual pleasure.
You can start by caressing your clit with a lubricated finger. Saliva can be used for lubrication.
Once you have located your clit you can start playing with it, and the sensations may well follow. Sometimes the build up to orgasm takes time.
Hope this helps as a starter.
You don't say how old you are. If you need more help understanding your body, please ask. You can sign up and ask personally if that helps.
Hope you get on ok.
More tips can follow, depending on how you get on with this.