only 14 need some advice x

I’ve had my period since i was 11 and I really want to try tampons but I’m worried about putting it in and not being able to find the string when trying to take it out, I’ve used one once but it was a super ( which felt a little uncomfortable ) and I literally just put it it and pulled it back out again.

I need some tips on how to put it in and what size ones should I be using, ( also I have a very irregular ulnar flow so I would really be able to say if it’s medium or heavy )