Creo might not be easy to learn, but this file explains it's basics pretty well:
http://www.ptc.com/WCMS/files/141030...mer_Creo_2.pdf
And this site is a grand database of lectures, covering basically every aspect of modeling with Creo (a sign in is required, tough):
https://plms4schools.ptc.com/precisi...EF27E31178CC37