You can use a safety pin to do it.
put a needle in the nozzle hole and point it in the direction you want it to spray
Normally you can stick a safety (or other stout) pin that fits in the nozzle and move it that way. Most all nozzles are adjusted this way. Trial and error.
by rotating the ring which cover the opening of the nozzle
Unless you have lost the nozzle there is no reason to ever replace it. It is probably stopped up. Take a needle and unstop it.
The nozzles pop in and out easily if you twist and slide them around.
On the inside of the hood disconnect the washer hose from the nozzle, and squeeze the plastic under it together. Then push it up it should come out pretty easy.
No adjustment is possible.
You must remove the arm of the wiper and move it down
yes
It is very easy ... Open the hood ... there is a long cover over the washer fluid tubing that connects to the nozzle .. so you have to take this cover off ... separate nozzel from tube . Insert new nozzle from outside of car . connect to tubing .. replace panel/cover and you are done !!!
You don't. I had this problem on my 2002 Envoy and there was no way to clear the blockage. I tried putting the nozzle in warm soapy water and shaking it to remove the blockage, but that didn't work. I tried soaking it in alcohol and shaking it to remove the bllockage, but that didn't work. Finally I took a paper clip and worked it around inside the nozzle. No luck. Everything I did made it worse. You have to replace the nozzle.
Your windshield AND wiper blades a good cleaning. if the blades are a few years old, replace them.