It was a bit rough in the beginning I admit. I’d recommend giving it another try.
You can look up this thread that has an updated tutorial.
https://www.reddit.com/r/revancedapp/comments/xlcny9/revanced_manager_guide_for_dummies/
Very easy to follow and should get you going.
I was using landrop before. Works fine but the GUI was just a bit off, not intuitive enough. That’s Localsend’s biggest improvement IMO.