I am not sure there is anything easier to change on an Explorer, even they battery can be more trouble
Remove 1ea 10mm bolt that retains your cruise control
Remove 3ea 8mm bolts (can be other sizes too diff years) that retain the blower motor to the housing
Then there is a gasket and the wiring plug to deal with
Be prepared to remove some debris from inside the HVAC box, a small vacuum and compressed air work well here
Clean surface, prepare new motor with gasket and re install
I like Motorcraft blower motors but I have had good luck with 4 seasons brand also........
You can buy a motor with or without the squirrel cage, if you re use the stock part I like to wash it in the sink before re install