Kofi
I use a site called Ko-fi. It's a cute little site that lets you support your favorite creators through small donations. Each "ko-fi" is $3 a piece and you can send as many as you like, it's small but every bit counts and I appreciate each and every donation!
Patreon
Wanna support me little by little, kinda like a monthly subscription? Then patreon is the way to go for you! You can send me a bit of cash each month and for each tier, you get special rewards catered to that level, like early access to commission slots, becoming a member of my discord server and more!
Redbubble
Redbubble is a little place where I can sell my artwork. I will sometimes upload sticker, shirt, and print designs that I have just lying around collecting space in my head. Redbubble is sort of my dumping grounds for all merchandise ideas I have that I can't produce myself because of limitations I have. So I upload my designs and redbubble does it all for me! If anything you see from this little preview interests you, please feel free to peruse my entire redbubble portfolio and get a little something for yourself!