Hi Andrew! Welcome to the effort here
It's such an interesting thing and somehow it seems we are able to actually help each other explore this..
If you've a mind to, would you consider posting some sort of a log
on this thread?
It's really interesting to see what others' experiences are and you might find that it helps you to stay on track. I have, for sure.
I agree with Scott Bird, just get a start on it by splitting your sleeping time into two sections. Also it seems pretty central to this process to think in terms of 90 minute sections. You'll see a lot about that and links to all sorts of research and other literature.
So, perhaps a 90 minute nap and then some multiple of 90 minutes for night sleep. Then go from there. A lot of people seem to find that their sleep cycles shorten to less than 90 minutes. But if you set an alarm at 90 minutes and then get up if you wake up shortly before, then you'll probably allow your sleep cycles to "train you", that way.
So welcome and let's hear from you!