My family knows I draw, and they’re mostly very supportive now (Mom used to lecture me about my art style and how digital art is not “real” art), however I think that’s mostly due to the fact that I don’t ever show my stories to them, especially not to Mom. Once I made a one shot for a comic contest and actually won, and Mom demanded that I show it to her. She ended up becoming really worried about both me and the main character and I had to lie to her about the ending (“Of course he’s gonna make it, Mom”) to calm her down. So, considering I am now drawing a comic involving literal war crimes… not doing that again.
My siblings, on the other hand, know all the details about my stories but aren’t really interested in them as long as they’re not published anywhere. They sometimes like some of the characters, but especially the younger one makes it very clear that they’re not interested in all my stuff.