Removing front cover...
 

I need to be super careful when removing the front cover right? Any advice? I don't know if there is any advice for this... or how hard it is. Just wondering.

It's a bit of a pain. I assume you have read the Mazdatrix FAQ on the front torrington bearings? That's about the only danger in removing the cover. Keep the clutch depressed during the entire procedure.

The front nut can be a real pain to remove. It's torqued to 90 ft-lbs and will be Loctited in place. You'll need a big impact gun or a large breaker bar and a 19MM socket.

Other then that, it's fairly straightforward.