Congratulations on your first bra purchase. I remember when I got mine. I did a similar thing and got one that was a bit smaller on me thank thought. I was going off my mom’s sizes, and figured if it worked then why change. Never realized her bras were worn in.
Still I love bras, they are the best part of womanhood. Granted as sizes go up, the options decline, but they are pretty regardless. Hopefully this will be the first of many.