Kasspian’s honest read
Print on demand works if you already own an audience or have a genuine design edge, because the printing itself is commoditised — your distribution is the entire business.
Who actually pays
Fans of a specific niche, creator, or aesthetic. People rarely search for generic t-shirts; they buy a design that signals something they already care about.
Riskiest assumption
That good designs sell themselves. They don't — the printer takes most of the margin, so you need a cheap, repeatable way to reach buyers who already trust you.
Cheapest test first
Post your best three designs to the community you'd sell to (subreddit, Discord, your own following) and see if anyone asks to buy before you set up a single mockup store.
The economics are the catch. A print-on-demand supplier takes the production cost and a healthy cut, leaving you a few dollars a unit. That's fine if traffic is free — if you have an audience, a niche meme page, a creator following — and brutal if you have to buy every visitor. The product is fine; the question is always where the buyers come from.
The winners pick a narrow identity and own it: a specific hobby, profession, in-joke, or subculture where a shirt is a badge. Generic 'funny quotes' stores drown. If you have access to a passionate niche and can make designs that community genuinely wants, this is a legitimate, low-risk side business. If you're starting from zero audience, build the audience first.
This is the read on the category. Your version isn’t the average — get the honest call on your exact idea, with live market data, in about 90 seconds.