Welcome to pianostreet! First things first: read this before doing anything else. It will save you a lot of time, trust me.1) I think your teacher is the best person to ask on this subject. If you are not studying with a teacher, you should find one, he/she will correct all the mistakes you make, specially since you are a beginner it becomes an even more important matter.3) Again, read the link I posted above.2) I can't answer this, because not everyone learns at the same speed, but maybe if you told us what pieces do you like/want to play, we could give you a more detailed response.I'm sure you'll have fun playing the piano, as it is, in my opinion, the most wonderful instrument ever created. Good luck and don't forget to come around if you have more questions!