I'm looking for GOOD info on starting/building/running membership sites

I have one membership site that I purchased 6 months ago that is making decent money and I want to explore the idea of starting more sites. The site was already built and I don't have much html experience, I'm trying to learn things as I go. I was hoping that someone could link me to some good reading info on how to start and build and run a membership site. Specifically, I would like to learn more about how other people accept payments, how to set up login systems where users can create their own password, and more about automating everything (password requests, etc). I just want to read more on the subject but can't seem to find any worthwhile reading material. Everything I found on google is trying to sell me something I don't want.

Thanks for any help.

I guess no one has replied because there is really no good information for free on the web. I guess its because people dont want to share information that could increase competition in their niche?

Ive tried also. Ive especially tried searching for membership site ideas, other sites that have been successful with unique ideas etc, cant find the info