A. You can learn the basics on how grids work via:
B. 0.5 seconds works just fine for me. If your connection is spotty you can try 0.75 seconds but from my understanding this delay only kicks in after miqo detects the completion of the previous action.
C. See Antonkell’s answer above.
D. If you want miqo to perform a series of actions, such as gathering several items then crafting, you need to use a scenario. The easiest way to learn is to download some scenarios and observe how they work. Miqo also has a handy help file built in that details the different commands, and can be accessed by clicking on the “?” near the top row.