Gimp Tutorial: How to design your hoodie or t shirt in Gimp 

I use smaller dimensions/ resolution just in case some of the people watching have entry level machines. You can scale it up if you know your machine won't start freezing. Also note that the color mode is RGB for all tutorials and templates I post/ share.

I'm having that same ISSUE

The stroke color is most likely white, you need to change it to black, and then it will be visible

Hi if it's the thumbnail you are referring to I used mockups to show what the design would look like when printed on a t-shirt or Hoodie

way too fast

Slow it down

There’s a play and stop button stop being lazy