Thanks for posting and I hope you're enjoying getting started! :)
While our other Forum users may may be able to point you to specific Dropshippers, you may also find some of our own Supplier links helpful for you search too.
Hope this helps you out!
Koreen W | Shopify
You can also try print on demand.
We have 100+ unique products - shirts, hoodies, phone cases, laptop sleeves, mugs, wall art and more.
Select products that you like, upload your design, edit details and start selling.
You can get Printify here.
Check out our Air Waves On Demand app. We offer custom apparel from a US based supplier. The entire dropshipping process is automated through the app itself.