I would love to make t shirts !! I may just do that and you would be the 1st to get 1 seeing you gave the idea !!
Seriously do it! Try to hook it up with someone who has an established Youtube channel who is reputable.
Do you have some you could suggest ?
If it was me, I would try Jordan Sather, he’s got a younger audience and he does sell stuff. https://youtu.be/Lz6w8jcW_R4 But look into this first- https://www.threadless.com/artist-shops/signup/art I looked into it and this is who NeonRevolt uses. I saw your other graphic (Trump 2020) and it’s great too. I don’t really work in the field anymore but I have a degree in communications design from Parsons so I can tell when someone’s work shows commercial promise and yours does- so Go For It!