How do you guys post on social media?

I have been going back and forth with my self on weather I should start posting on social media or not. I’ve never been the type to put my life on social media and I’ve always thought it was kind of strange when others did, but in this day and age, everyone does it. I feel like I’m the only one who doesn’t post anything. It makes me feel like I have a boring depressing life, even though I know I don’t. But when I even try to post anything I just think” why am I posting this, so people can see it?” Thats why we post isn’t it? Or it will take me a week to decide if that thing is worthy of me posting and I’ll obsess how it will make me look. Idk, I do want to start because I feel like it will help me find myself and maybe make some friends but I don’t even know where to start. Any advice?