I see so many people every week with wiper problems at work. They are very simple to fit
Lift the arm of the wiper up fully
Turn the blade upside down
Some will just pull down off the U hook and some have a switch that needs to be pressed in on the blades connector and then you pull
New bosch ones get them the right way round so facing to the passenger side
Turn it upside down and push into place then turn it back round and your done