Making T-Shits is SUPER FUN!!!
We made Shirts for our gaming group :D
Also it is really affordable in Germany. Not sure how it is elsewhere.
Also, about toyhou.se:
Yes, it is still in Beta and only working with a Referral link. But people who support them through money get codes each month and literally throw them onto the public, so it is not that hard to get access.
Actually it is no normal page to publish your art. It is mainly dedicated to characters. Either making folders to sort your own characters. Or you can trade or sell or buy characters.
If you wanna check out, this is my profile:
https://toyhou.se/Limikkin