Read the manual for 2 reasons:
1. find out what Hex can do that C cannot
2. learn the sequence for commands (not as obvious or intuitive or consistent as you might think); wrong sequence = does not work and may crash
Go slow and deliberate, Hex will get lost if you stack too many commands in a row, wait for Hex to respond before moving on
Practice on a separate file to learn one new thing at a time. Amazing, do it once successfully and you are usually go to go for real
Learn to recognize tri’s, quads, and n-gons. Often you want only quads as they work using smoothing tools, tri’s & n-gons may not. Export to another program with n-gons and trouble often follows you.
Constructions can be done many ways, consider the tools before you start making polys; have a plan/process to modelling
Learn about the lightning bolt button; when to leave it alone and when to use it (dynamic geometry on/off)
Keep everything simple/few polys until you are near done, then smooth…do trial smoothing as you proceed to see temp results, then undo smoothing until near done…overloading with large model complexities (too many facets) leads to Hex trouble.
Be watchful of what view you are using as tool results (such as bending) depend on camera view you are using (seems odd but that is the way Hex works)
Experiment and play.