tampon troubles

hey y’all, so i’ve tried tampons so many times but every time i still can feel it and it hurts while sitting. so i know that’s not right but i don’t know how to fix it?

i’m pretty sure it’s bc it’s not going up far enough but i’m having trouble getting it further (kinda tmi ahead) bc i feel like “down there” is too fat ??? so does anyone have any tips or advice?

and apologies if i described any of this weird or if this wouldn’t be the right community :p