As you said: “Of course everyone is different” and
the best recommendation is probably to get to learn your body and the signal it sends you.
As a complete newbie, I started with no days off at all. But I started slow. Later, I needed a few breaks, mainly mentally. Getting energi for the long jelqing sessions was hard without a few resting days.
Nowadays, I mainly take resting days during week-ends because it is hard to get PEing privacy then. Sometimes, I also feel worked-out and need a break for that reason, but that is more of an exception than a rule.
Oden