Using Tampons??

Okay so I’ve had my period for about 1 and 1/2 years now. I’m 15 and I do sports (not to mention that pads are just uncomfortable for me and I hate soaking in my own blood). So naturally I’d like to use tampons. I’ve tried and tried and I could never do it. So yesterday and today I’ve also tried and tried, I made some progress but wasted a lot of tampons. I don’t know why but I feel like I can’t put it in very far and I yeah I guess can’t get it to go all of the way in. I thought I might just be tensing up but I couldn’t stop. Not to mention my arms and legs were shaking from trying multiple times for like 30 minutes every time.