You could do far worse than just browse some of the threads on this forum -- particularly in the "performance", "repertoire" and "miscellaneous" sections -- to get some idea as to some answers to your questions, as well as some insights into what "real" pianists are like. There is quite a mix of folks who post on here; a lot of students, but also a surprising (well, maybe not) number of practicing pianists, including a few performing concert pianists. Browse happily!
If you have specific questions, with patience you will probably get them answered too.