Ask HN: I'm a dev and want to collect money from a website. Any tips?

I've written tons of webapps, professionally and for fun, and know all about the software side of it. I'm more curious about what I should do from a... business?... point of view. Do I want or need an LLC? Is there anything I should to to protect myself? What sort of pages should I put on my site (privacy policy, length of data retention without active subscription, etc)?

The answer generally is "lawyer up" but I am not really looking for legal advice. Hoping for more of a bulleted list of "here are the steps to follow to make sure you're doing things correctly." I'm fine if that list includes a "lawyer up" bullet point but it can't possibly just be that.

Thanks for any help!

edit I've an idea for a web app that might actually be useful enough that people would want to pay me for the privilege of using it. I've never charged for any of my webapps before and, though technically know how to do this, don't know about the non-technical aspects.