BC is not intuitive to use. It's sloppy, lazy software written by dysfunctional children poking their phones. To more easily grasp what it is, you need to understand that it's a GPS simulator, not mapping software. This is why nothing works like an actual mapping software program should. You can't just move the cursor to the map and do something, you have to first select a tool for the cursor, etc. I hate it. I don't use it. It was never finished and now it's obsolete and unsupported by Garmin. Oh, except suddenly there is Basecamp 4... Always in beta, imho.
Re: Win11
https://www.gpsrchive.com/BaseCamp/index.htm.
There are some very good teaching aids out there. Watch as many as you can find. Search here on this forum for some good tips and links too.
Here is an intro that starts from scratch and explains some of the initial pitfalls that often confuse people, (like no maps w/o linking your GPS or downloading maps to your PC.
LINK
Good luck!