Online Tutorials
There are a number of online tutorials which have been posted on YouTube, aimed at people with Structural Biology knowledge and introducing them to the world of 3D.
Blender for Biochemists
Below are the videos on a general introduction to Blender for Biochemists and others alike, focusing on how to export proteins from PyMol and ChimeraX and import it into Blender.
Molecular Nodes
Tutorials focusing on how to use the current iteration of Molecular Nodes, from importing from the PDB and doing some basics of styling and rendering the proteins.