I just found out that there is other things that you can do to get a better feeling

Yes, there other ways to masturbate beside using a pillow.
The first thing you need to learn to now how to masturbate is where your clit is and what it is. Your clit is the most sensitive part of your vagina because is where most of the nerves are. To find it sin on your bed or on a chair with your legs wide open (and obviously sit naked). Just slightly bellow where the vagina lips met at the top, you should see or feel a small knob of flesh coming out in the middle between the lips. That's your clit.
The most common way to masturbate is to place your fingers on your clit and start rubbing in circles or up and down.
Another ways are to use an electric toothbrush, or any thing that vibrates, and place it on your clit and make it vibrate. If you have a bathtub, you can place your clit wright under the water stream to make the water "rub" it. If you have a pool with a pool jet (that thing that sucks water and releases a stream of new water on the pool) you can put your clit in front of it to use the water stream it releases. Some girls like to put some cream or anything tasty in their clits and let their pets lick it.

Another way to masturbate without using your clit is to finger your vagina whole. I do not recommend that at your age because you're still a virgin, and it may hurt. But if you still want to try, under your clit is your urethra, which is the place where the pee comes out from, under that, at the bottom of your vagina between the lips is your whole. You can try inserting a finger there slowly. But first you have to be wet!!! never put anything in your hole it you're not wet!!! (to make yourself wet you can: masturbate in another way until you're wet, watch some porn, or think of naked boys)

I don't know if you have boobs yet, but massaging your boobs and rubbing and pinching your nipples while you masturbate your down on your vagina fees very good.

Ask me if you have more questions :)