Tampon help?

Lauren • ❤️💛💙💚💜
Okay so, I've been using pads since I had my first period but now it's getting to the stage where I want to use tampons because it's starting to feel really gross and I tend to leak every now and then. I haven't had sex yet and I know some people say you can only use tampons if you've had sex. I've tried using tampons but I just can't seem to, you know get it in. Because it stings a little to much. But I'm getting desperate so. Any advice?? Thanks x