As someone who has been through almost all courses from the Graphisoft
Learn platform I highly recommand it.We use the basic courses as
mandatory training for all new employees regardless of how well they
know (or think they know) how to use Archicad...
The slab stops at the wall probably because of the building material
intersections.Here's an article explaining how priority based
connections work in the AC26 User Guide or an older video that is still
relevant.Another way you can avoid intersection...