How do I put in a tampon?

I've looked through other posts but I just keep seeing "Instructions are on the box" but I got mine from samples because my mom doesn't like the idea of something other than a penis going into my vagina, it's ridiculous.  But I have swimming for school and I have tried previously to use tampons and they're always uncomfortable and my friends say it's not in at the right angle? What angle do I put it in at and how?