Best of luck to you! I've been around them for over a decade now, and still can't commit the various services to memory.

I like to call what I do "taking the coward's way out" -- using FreeIPA

My team setup the infrastructure in question and I've been too slow to learn it. FreeIPA is nice for quick/easy deployments.

I'm not sure how well it "scales", but it's great for getting comfortable with the "Domain Language" (sorry, pun)