evening all this is my first time posting and my first time owning a VW and my first gti

a couple of niggles nothing too major i think
first off the power steering seems to be a bit rough and squeeky on start up, is this an indication of anything?
second the rocker cover is leaking is this hard to replace? it looks and seems pretty straight forward but i wouldn't want any dramas if i pull off the rocker cover
third off the in02 thing has come up i saw that this means serious service but the previous owner has definately just serviced it so is this just a default code to come up if its not been reset by a vw dealer? and nothing to do with how the car is actually running
looking forward to getting know you all and thanks in advance for any helpful replies
