Hi, Baron, and Welcome to Steemit.

I trust you'll find this platform quite open to posts in many of your interests. As for your self-proclaimed "shitposts," it's probably a good idea to leave them on YouTube or other platforms. While there are a plethora of such shitposts on Steemit too, they are generally ignored, and earn only peanuts worth of Steem.

As for being introverted, that's hardly an issue here. I too am pretty much an introvert, such that I abandoned my F_c_Book account after being on it only a short time. Steemit is something quite different, offering a platform where you can upload your creative work and which is quite unlike the hyper-interactive networks of F___Book and the like.

Below are a few basic points of advice re posting on Steemit.

1. Longer posts are more lucrative than short posts. If you make a post of 20–30 paragraphs, it's more likely to earn rewards.
2. Include some photos, images or graphs, to complement the text.
3. Make sure the text and photos are formatted properly, so that your post looks attractive and appealing.

Hope this helps for now. Good luck, and Full Steem Ahead!