I do not know of any tutorials for Split Levels. Typically we set up multiple View Maps which are on the same level with different cut planes and then stitch them accordingly in the Layout Views. Cumbersome, but works quite well graphically.
Robert J. Garand
ArchiCAD USA 27-Build 5001 USA FULL
Windows 10 Prof (64 bit) - Intel i9-10920X CPU 3.50 GHz - 128 GB RAM - NVIDIA Quadro RTX 5000