Tampons

So I have never used a tampon. I’m 18. My 15 yr old sibling has judged me about not using one even once. We’re going on vacation soon and it might overlap with a little bit of my period. I don’t use tampons bc they freak me out. I don’t like the idea of puttin something inside me. But I’m nervous I feel like I should learn how to use one so I won’t get judged but I feel like that’s a dumb reason. I just can never muster up the courage to actually put it in me. I’ve tried and I end up freaking out too much about it. So I just avoid them at all costs.