what style should i choose?

get some exercise, take care of your health, trim your hair on a monthly basis, wear some yoga pants (in black) nice tank top (NO CLEAVAGE) and a button up shirt. thatd be cute
if you want to cover up some of your "overweight" parts then wear a long scarf that will cover up ur tummy or wear some baggy jackets.
GOod luck!!

Choose something that makes you feel comfortable! That's all that really matters. If you are comfortable and confidant in your skin you can pull off anything. It's your additude that makes an outfit.