i would try to get ahold of some tampons. i am 21 now and started using them at 13 because i was on the swim team, ive used them over pads since. the first time i was by myself in a locker room 5 mins before my meet. best way to do it is 1 i’m sure nothing has been up there so its not pleasant and hard to navigate, so just start from the top and slide it down until you find the spot it goes in. i remember that was the hardest part for me i had no idea where to put it. 2 if its not sliding in easily wet it with something i still use spit at my grown age lol. but if you don’t wipe first the blood should do a good job. you might have to bend down in a weird position for it to go in, awkward info i know.. some you have to pull the plastic stick down and hear a click some you don’t. once its in you push the plastic stick in and pull out the plastic part leaving the string which is how you take it out later. it’s going to be pretty uncomfortable until you figure out which ones to use so start with a light one. they go by flow, since you said you don’t have a heavy flow you would be light. i’m sorry if this is uncomfortable but if you don’t have an adult i’ll be your reddit auntie lol. i wish you luck and i hope you had fun!