Welcome aboard! I agree that a setup diagram would help. I will put one together in the next few weeks. Life has been pretty hectic but I wanted to get the game released. In the meantime, I have a YouTube video playthrough on the solo game if you need it. :)
Rust & Revenue is definitely a step up in complexity. If you get hooked, then there is a whole world of gaming that opens up with the genre. Charters to me would be a slightly easier on ramp but the components are specialized enough that it would be a harder build to find parts for but an easier teach.
Regardless, thank you for the kind note! Let me know if you have any questions. :)