hahahaha wow you guys suck at giving advice, thank god the Sexpert is here to save the internet.
Well, the basic way most girls start out is by rubbing there clit, im sure you know where that is right?
you need to experiment with different ways and pressures and soon enough you'll figure out what you like the best, make sure your nice and horny first though
with fingering, not as many girls get off from it, but some girls really can big time, so its hard to say, with fingering, just going in and out probably isnt gonna do much for you, but try going for your gspot, use your middle finger and go inside and feeling up towards your stomach, and when your down to your 2nd knuckle deep you should feel it on the roof of your pussy, the texture is different, you will need to be quite harsh with your gspot (in comparison to your clit) to get the same effect, using two fingers seems to work the best.
Those are the most basic ways, but if you want to spice it up a bit:
*If you have a removeable shower head, use that on your clit, thats a big one alot of girls like
*If you have an electric tooth brush use that on your clit, but make sure its clean and that you only continue to use it for that, and another one for your teeth
*Rubbing yourself against a pillow on its side while in bed (the edge between your legs rubbing your clit) and getting off like that, I like that one because it gives you more of a feeling of sex in my opinion, just because your laying in bed and moving around quite a bit.
those are just a few off the top of my head but there are loads if you look up advanced female masturbation, there are plenty of things to try and homemade sorta sextoys or things you can use to get you off.
Hope this helps, need anymore advice, just ask