Plussize Femboy Fashion advice

Heyyy!

So i have been interested in/mentally and emotionally participating in the culture for a while, but as a bigger person (6'2" 300lbs[im working on it tho]) i have a hard time finding clothes that fit me and dont make me look icky. i thought larger dresses would be good, but i want a more casual, streetstyle and in dresses i always end up looking like a grandma lol. basically i just see all these super cute boys in adorable outfits and want that for mee~ anywayy any advice would be awesome! thank you :)