Is part of what you’re wondering about how to keep yourself from getting ahead of your goal and then not having to do any work for a little while (like if you do your target habit 6 times one week when you’re only enforcing 3, then you won’t have to do it again the week after, breaking your “rolling window”)?
If so, there’s a “Max Safe Days” feature that can make it so that you can never have more than X days off from your goal. Your road will move towards where you are, so that you can’t build up a huge buffer and then just fall off the habit by not having to do it for a while.
But ramp up slowly, whatever you decide. In terms of “veteran” advice, being overzealous has always been my own worse habit (and it’s way more destructive to habit-building than we ever expect it to be)… which is why I like taking my overly optimistic self out of it and letting settings do the trick.
That might actually be a second reason to use the “Max Safe Days” feature. If the absolute minimum frequency you want from yourself is what you Beemind (say twice a week is what you want to absolutely commit to), but you’d really prefer to try doing that thing every other day, then you can set your road’s rate to 2/week, and then set “max safe days” to 1 (every other day = only one day off allowed). That way if you wake up one morning and realize you can’t handle that frequency, you’re still on the hook for the twice a week commitment for the rest of the week (the “akrasia horizon”), but you can change the “max safe days” to 2 or 3 or whatever, which will stop enforcing the every other day rate. This can allow you to play around a little with ramping things up, but some safety & freedom to cry uncle more quickly as you try on the new rate for size, but to also have a bare minimum that you still have to adhere to no matter your other whims or temporary circumstances.