I am about to do the same thing myself. I am taking my YouTube channel, slightly re-branding it and launching a NodeBB and GhostCMS site. I am still trying to set it up on AWS at the moment. I am attempting to dive into the deep end with a full cloud setup. I only have 1K subscribers, very few social media followers, so I don't think I'll be bringing in much right away. I am going to basically BEG some friends to be active on there to stimulate conversation.
Outside of that, I am hoping SEO from the blog helps. I want to do my best to encourage engagement and add as much social interactivity as possible in the site as I can.
Accessibility is another key focus. I do not know if it is built in yet or not, but I am considering if I would want some kind of "add to home screen" button. And when would be an appropriate time to show it.