How can I get over a fear of posting on social media?

I would love to post more on social media but I just don’t feel like I have anything worth sharing. I know what kinds of things I would post, but I worry people wouldn’t care or worse- they’d care too much. I’m a pretty optimistic person by nature but sometimes I would just like to post my dark art and my sad thoughts without having people reach out and ask me if I’m okay. I am okay and I trust myself enough to know I wouldn’t harm myself. I just enjoy the darker things in life. I worry about the judgement of my family and this severely limits what I’m willing to post on social media. Does anyone have any advice? :(