I cant fit a finger in!

so i’m 16 and i’ve never done anything other than i guess rub my clit to orgasm. but when i even try to touch myself where the opening is it’s SO sensitive like i tense up. i cant even attempt to put a finger in because it’s so sensitive to the touch? is this like a condition or something? or what because all these 13 year olds literally finger themselves and i cant even get a single finger in without squirming. i rlly wanna try new things i’ve been stimulating my clit for YEARS i need tips! and yes i’ve gotten wet and tried to relax but no matter what it’s so sensitive ! i feel like it’s maybe more overly sensitive than what is normal? am i the only one w this problem?