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Hello and thank you for using just answer.
This is an easy job, here is the diagram:
Note where to install the tool, there is a 19mm head casted into the tensioner bracket for releasing the tensioner. Also a tip for you when reinstalling the belt it is easiest if you go around the water pump LAST....the belt fit is VERY tight here.
Depending on what tool setup you have you may find it easier to access by removing the upper motor mount that is retained by 3 14mm bolts:
The motor mount pictured just holds the engine still- not weight supporting, no issues here, just remove the 3 bolts as I stated if you need the extra access room, I fdo not remove this but you may need to.
The tensioner is not weak....it's very strong, you need to pull toward the front of the car to release tension. I use a 19mm socket on a very long ratchet when I do these for extra leverage.