How in darktable can I arrange a set of modules to be available when needed?

[kofa (István Kovács)]

@meaningfullyhappy

arranged a certain way in the pixel pipe. E.g., Color Bal RGB to precede Color Calibration, Tone Eq to follow most other modules, etc.

Since you are a new darktable user, I’d strongly recommend that you stick to the default order. The developers put the modules in a specific order for a reason.