masturbating

Alrighty, so I'm 16 and I've been wanting to try masturbating for a while now. I'll be relaxed and in the mood but I can't seem to ever even get close to actually masturbatiing. It will mostly just tickle a little bit on my thigh right below my vagina but then that's all. I've tried many things but nothing seems to actually work. I'll be turned on but I can never really act on it. Any tips or advice? Thank you all so much.