I want to record myself playing the piano. I am a complete beginner when it comes to this, so I just want to ask the basic questions, so I can and make an informed decision, once I buy the equipment (I have about 1500 USD to spend).

What components do I need, what do they do and what do I have to think about when buying one or the other? What do you have to think about when setting up the recording (positioning, acoustics, etc.)?

Note: I know there are several questions in this question, but mind you, this comes from a newbie who, just want a push in the right direction.