Well everyone is different , so everyone needs different meathods. Some girls can masturbate and cum really easily , others need more work. So youve tried humping a blanket , well there are other things to hump like pillows which give a nice shape , and others like humping stuffed animals. Whatever works. But if your going to hump your pillows , keep a special pillow for your adventures unless you want to use that pillow while sleeping. Other meathods are using your fingers , you can masturbate using body fluids , saliva , or lube. Use water based lube because anything with sugat can cause infections. The best way to do it is think of something sexy and rub the outer area of your vagaina , once you feel wet , start rubbing the clit , once your comfortable , start entering the vagaina , find your G-spot (your favorite place) then as deep as you please and cum away. If that dosnt work , try to make a dildo or buy one. If you 13 or 14 youll wont to improvise , an example is getting a comdon and filling it with play-dough , this lets you mold it in any form and shape. You can also use a shower head , let the jets of water massage your clit. You can use markers and anything else you might think that might stimulate and make you cum. The amount you last is just your resistence , it will get longer the more you masturbate. If you want even more home made meathods , check out the forums.Please tell me if you tryed and if anything worked.