How to test if people would use your product before starting?

I have an idea for a product, it wouldn’t be very difficult to set up a store and start selling as it would ship from a print on demand supplier. However, I don’t know if anyone would buy it so I want to test that first. Is the best way to send out surveys? Set up a landing page and see if people try to buy it? Just set up the store since it’s not a ton of work and try to g set some sales?