Style help

Kat 👽🌱 • feminist / 22 / wife / cat mama / chronically ill /
I've been stuck in a style rut. I used to dress up all the time in high school I'm 21 now. I feel like my personal style is blah and mom-ish. Nearly every day I wear jeans, t-shirt/tank, and a cardigan  Any tips on how to spice up my wardrobe on the cheap?