off-beat, down-beat ... WTBeat!

Hi Pianoweekly. I'm beguiner (2nd year). And, awfully confused with "off-beat" "on-beat" "down-beat" "up-beat", that is, the "jazzy" accentuation of the notes, etc. It would be absolute great if you could make a video clarifying these xxx-beats, and some exercises to get the right jazz accents into the fingering. Grateful for ever!