@Totalanimefan: That's just it, though, I have no idea! Physical stores rarely have anything I like on the shelf (especially with my non-existent budget), so I look online, but I can't really visualize how something will suit me that way.

I forgot I posted this, sorry everyone lol but I appreciate all the replies!
Will definitely look into thrift stores whenever I have the money and time, though I haven't had a lot of luck with them in the past since there aren't many stores around here in the first place. But you never know.

For the most part, I'm just mad bc online stores, men's clothes especially, never show much variety in models' body types. Like yeah, it looks great on that guy, but he's shaped like ▽ and i'm shaped like △ and about half his height. I don't wanna have to buy the fancy sweater just to find out it looks ridiculous on me. But they don't carry the fancy sweater in-store, oh no. Only online. >:(

Looser fitting stuff is definitely more for me. I hate the feeling of shirts clinging to my body; it makes me really self-conscious. But being short and on the chunky side, too baggy can also be a bad thing. And "style guides" always seem to cater to people who dress like they're at the office 24/7, so they have been largely unhelpful.

I have an idea of the 'looks' I like for the clothing itself, but no idea if those would suit me. I just think major retailers should hire more toads to model their clothes, and not just to clean their bathrooms. -_-