It does not need to be a developer to build the program. I did with limited knowledge following the build instructions.
I suggest you go through the Wiki and manuals to see what is already existing. Then there is room for improvement and additional tutorials. Zulip Chat will also be helpful to connect with active people on the project (code, documentation, etc.)
I am using lots of Open-Source software ... [but LibreCad] annoys me, every single day comes with new surprises.
I was just thinking that I would contribute a COMPLETE LIBRECAD TUTORIALS series to the community...
I totally agree there is something unexpected about the user interface but I couldn't describe it and after I did the Carport Tutorial most things seemed natural. Given your experience with other graphics applications, documenting your interface expectations as a new user would be useful before referring to the manuals and tutorials.
In my view between the LibreCAD User Manual in preparation and the Dummies Guide I think there are enough manuals but more tutorials would be useful. Contributions are always welcome in whatever format you are happy with but consider contributing to the existing documentation.