Sorry if this is out of place, I could not find another Mazda group.

I need to change the timing belt on my 99 626 4 cyl (80,000 miles).

I am pretty decent at working on cars, I can do brake work (disks and
drums) I always change my own oil, I have attempted a timing belt
replacement on an 84 Toyota pickup before with little success (I did not
keep adequate track of bolt locations.)  I have replaced the clutch on a
95 Tacoma 4x4.

Is this engine difficult to service?  I mean I can save 200 or more
dollars if I can do it myself.

I assume I will need to extract the engine, or can it be done with the
engine in place.  What about water pumps, etc?  I mean, should I just
cough up the extra cash and hire a shop to do it (part of the problem is
I dont trust shops).

TIA all!