Rails App Setup/Walkthrough

I'm looking for someone to spend a few hours with me setting up an existing Rails project and walking me through it. This is a private project so unfortunately we'll have to work through a screen share, which I know is not ideal. The app is Rails, PostgresSQL, and React. I'm QA on the project and want to understand the app better. I have some development experience with MERN apps, but none with Rails apps and need some guidance. This will be an hourly project, starting with a couple hours and going from there. Thank you!