drag the beat finder ‘beat’ to the nearest snapping position (to the left)
From there I align my tracks with the beats.
I’ve figured out how to do 1 and 3 with a macro.
How can I open the generate rhyhtm track dialog via macro/script?
How can I move the beat finder track to the nearest snapping position?
You can’t. Audacity’s Macros are just a simple list of instructions. When a Macro sends a command to run the Rhythm Track plug-in, it can include the required parameters (settings) for the effect, or else the effect runs with default settings. You can’t change that on the fly in a normal Macro.