Style tips

I dress pretty basic. Solid v neck t shirt from target and jeans or leggings. I have a couple jackets but that's it. I have a pair of light blue nikes and black boots and no other shoes. People comment on the fact I wear the same shirt twice a month and my outfits look so much alike. It makes me super self conscious but I don't have a lot of money and clothing always seems overpriced to me. I have a couple fancy shirts but I have a hard time styling them. I am over weight and wear a L or XL shirt and 14/16/18 pants. I can sometimes get away with plus clothing but it's always more expensive and harder to find. Pls drop suggestions of cheap clothing or how to boost my style on a budget. I don't have a lot of time in the morning either.