I haven't done mine yet, but it looks simple enough. I would think if you can do your engine and diff fluid changes, you should able to handle the transmission.
Cliffs notes directions I have for the change:
Park level
remove skid
drop pan
drain fluid
change filter (assume you can get from dealer or local auto parts store)
clean off pan, use high temp rtv to re-seal
fill to factory specs
re-install skid
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