Different forms of masturbation and stimulation

Hi, im only 15 years old but ever since i was11 or 12 I some how learnt how to pleasure myself by touching my clit. I tried using my fingers but it was never enough. It sounds weird but I used to rub things like socks or toys up against it, the friction was so much harder and more enjoyable. Now adays I have started to tease my ass hole more too, iv started small with my fingers and then gone up a size using things like mascara bottles because I'm too young to purchase a small dildo... Iv also tried to use my iPhone as a vibrator by downloading this vibrating app. I don't want sexual intercourse with another person because I don't feel quite ready and I want to loose my virginity to someone I love when I'm older... My questions are:- how deep can I go in my ass with things...? Can I damage my clit by using it too much? I'm constantly turned on, is this because I'm growing up and hormonal or because iv started to experience new things and can't stop? Are there other methods of masterbation or stimulation of that area, that do not involved vaginal fingering or inserting something inside my vagina because I want to keep my virginity..? Thank you x :)