IUD experiences?

So I’m 17 and I’m looking into getting an IUD of any kind I have irregular periods and endometriosis I can’t talk to my mom about any of this she doesn’t even know I’m getting it so i need some advice ive heard good and bad I’m looking into getting the copper one as it lasts the longest however I haven’t decided.. can anyone give me your experience on any of the IUDs theyve had good or bad thanks !