What is TeeSpring? 
Teespring.com is the best way to design and sell custom apparel online. You design a product and sell it. The sales money pays for the production of your design and we ship it to all of your buyers.
What do you need to do to make money?
You need to make a design for clothes and to post it on TeeSpring.
You can do the design on canva.com or in photoshop
You can find TeeSping tutorials on youtube.
For making money you should taje a t-shirt select the size, add the design and select the price. Now you can start promoting your clothes on social media. Good luck