Best way to learn catia or solidworks or any other design tool is to see someone do it and if you don not have the luxury of having someone around, then the web should be your answer.
From simple to complex, from modeling parts to detailing you can learn many of this in the video tutorials that i have listed below. Do check them out. More will come as an when i get time.
CATIA tutorials in YOUTUBE
Video Tutorials of CATIA in google video
Related links for CATIA
What is NASTRAN?
Solidworks CAD video tutorials
Catia vs Solidworks
EDST launches catiaa and enovia training center
Where can i learn NASTRAN and CATIA
