How do you know whether to pick low, mid, or high volume?

This is a big part for me, but honestly I think I can handle these parts. Physically I’m certain I can handle the volume, but I really don’t think I can mentally handle HV, so MV seems to be a better fit.

The issue with the HV plans for me, is the 1.5 + hour rides during the week. I just don’t feel that is mentally sustainable for me. What I normally do with the MV plans, is just add endurance rides on the rest days to get the extra TSS.