Just keep in mind that the lapping stone, like any other stone, will itself need to e lapped now and then, and also probably before it's first use.

The Norton set is a good way to start, and indeed a good set forever. You'll probably want to add another, finer hone later on, but I would recommend waiting until after you can get good shaves off the 8k. Otherwise, there is no point in going any finer.

As for the strops, modular vs hanging is personal preference. I am inclined towards hanging for regular use, though I did play with a modular and that was fun.