PRINT ON DEMAND PLATFORMS
Printful and Printify have different marketing strategies and features, but they both have one thing in common - they are leaders of this market segment. Yes, there are other players too, but I'd suggest sticking with these two.
KNOW YOUR MARKET
Merch Informer is a powerful and affordable tool for your market research needs. It works not only for Merch by Amazon but also for other print on demand platforms like Redbubble, Spreadshirt, and others.
Are you pro or just starting, but sooner or later, you will buy some graphic design to sell as is or for editing purposes. Ready to use graphics with commercial use license is perfect to quick start your print on demand business.