You don't need to put anything in your vagina. You aren't likely to get any good feelings from doing that and you shouldn't be sticking anything in there at your age but a tampon.
Stick to playing with your clit, thats where the best feelings come from. Your clit is much larger than the button you can see. It's roots go down both sides of your vulva and they respond well to rubbing too. I can't tell you how well it will work for you but I can give my wife an orgasm by just running two fingers up and down (one on each side) on the outside of her outer lips. I use my index and ring fingers, then when she's hot I I can spread them a bit so I can tickle her clit and touch the other parts inside her lips with my middle finger.
Ladies, try this.
I have this like, Nerf football. Its kinda small, like the size of both my fists put together. Its rubber I guess? and just filled with air.
Once Im pretty turned on, I play with my clit for a bit with my fingers til Im close to orgasm, and stop. That makes my clit super sensitive. Then I take my football, and pound it at my clit, so it feels like Im being screwed but, on the clit(: In a matter of like, 10, 15 seconds, breathtaking orgasm.
But wear silk underwear (nothing to thick)
Once u have underwear just start rubbing your clit area quickly,
I came in about 15 seconds :)
Also, breathing fast and moaning will help stimulate an orgasim too