You wish to know the principles of Chasidus while standing on one foot.

The same could be asked of someone starting Gemorah, but I have never seen such an approach. The main points can be found in Shaar HaYichud VehaEmunah, Derech Mitzvosecha, and Kuntras Limud Chasidus. https://www.torahrecordings.com/rebbe/igroskodesh/011/008/3463