I just replaced my water pump, with a NEW one. There was a learning curve involved there.
And the electric fan did come out easy. Replaced the upper radiator hose while things were apart.
The tension adjusting screw arrangement was new to me, but works fine...I bead-blasted & painted all the brackests & stuff I had off.
Luckily the serpentine belts seem to last a long time...

The long combo and Gear wrenches really do work good & save time & knuckles

 

I use a serpentine belt tool with a shallow 15mm socket to get the idler pulley loose. Then move the adjuster with a 2 foot 3/8" drive extension and ratchet. The 2 foot extension means the ratchet handle is high enough over the compressor that I can just spin until the belt is loose enough to come off. Installation same as reverse. The 2" extension is also handy for motor mounts and rear shock bolts. And the serpentine belt tool with a T-60 socket makes it easy to change the oil filter adapter o-rings. I had these tools from working on previous vehicles so I did not need to buy them for this.

 

My '92 is just the same as my '87, IIRC. Just like your diagram.