Gas/Air Compressor Build & Design Question.

I am interested in designing and building a multi-stage reciprocating gas/air compressor (and ultimately mini compression/decompression chamber).

My background is in software engineering, and design. I completed a several(hobby) projects such as a pressurized air delivery system, and some robotics.

I want to use a single phase 3-5hp electric motor. Two/maybe three stage compression, and whatever cooling necessary.

My questions:
1. Where do I start?
2. What are good sources as to learning how to design such compressor
3. Which software should I use to design it?

Thank you!