How old were you when you got ur IUD

I’m kinda thinking about getting one I’m not sexually active yet but I am on the pill because my periods are so irregular but I have recently been forgetting to take my pills and I’m going to college in 3 months and am thinking of becoming sexually active with my current boyfriend (going to the same college have been best friends for a while been dating for almost a year etc.) so I was just wondering how old y’all were when u first got ur IUD? also which do u recommend and y and is there one where I can still get/ make my periods more regular.