There is some ground-floor space in our building, currently used only at night by a sister-in-law: for her bar. I'd like to learn more about coffee in a hands-on manner, while defraying expenses somewhat by selling it by the cup. My sister-in-law will retire eventually, so there's some possibility of turning the space into a proper cafe. My own goal is more to learn more about good coffee with an eye toward importing and mail-order sales in the longer run, as much as possible in a crop-to-cup style.
Given my goals, and my starting point, what would be the easiest path? I.e., what equipment and blends should I consider first, what skills to learn, etc. I've never worked as a barista. I have a lot of respect for how complex a business can be even when it seems simple, and I have other business responsibilities, so I'd like to approach this startup problem as gradually and experimentally as possible.