There are numerous printing companies that will print your designs onto not just T-shirts, but also hoodies, hats, posters, cushions, bags, and phone cases, to name a few items. These businesses also offer fulfillment services. This means that you promote the merchandise on your own site and once you sell a product the printing company will not only print your design but also send the item directly to the buyer. So all you have to do is concentrate on the marketing and selling of your products, and the fulfillment company will take care of the rest.
Remember, the skills you have are an asset, they are your “unfair advantage.” They are essential to your unique personal brand, and you can start making money online using those skills if you have the right strategy, tactics, and mindset in place. Another way to describe this is your “unfair advantage,” a term I was first introduced to by Lain Ehmann in SPI Podcast Session #37.