Inkscape – Gimp or another - any suggestions please

I know I have asked similar questions a year or more ago but I had to put my possible T-shirt design business on hold but now I am interested in getting back into it and that I would like some different perspectives on a few programs for beginners e.g. I have been looking at Inkscape and Gimp to make up T-shirt designs. I am hoping to put design or two onto Amazon’s Merch program as well as a few other programs, but I’m not sure which one would be best as well as easy as for a beginner (even though I learned a little back when I first started).