Upload T-shirt Designs to Printful and Printify

I need help uploading over 10 t-shirt designs on Printful and Printify. I don't have the design files ready, so you'll also need to create these from scratch.

Requirements:
- Create t-shirt designs based on my ideas or themes
- Upload designs to Printful and Printify
- Ensure correct sizing and formatting

Ideal Skills:
- Experience with Printful and Printify
- Graphic design skills
- Detail-oriented and reliable