if you want more than just an autopilot I have a almost all 747 400 systems modelled in lua open sourced for xplane 12 at https://github.com/mSparks43/747-400 CBTs linked in an issues milestone.
> CBTs I wasn't familiar with what that acronym meant in the context of X-Plane but it seems to be "Computer Based Training", and after watching one of them I'm thankful for the 2x playback rate on youtube because whew
For flight sim hobby you can definitely watch CBT at 2x speed and just grasp a high level view on what buttons to press. But for real world flying you need the level of detail you see in CBT.
For example you really want to know what happens when you loose specific hydraulics systems and how things like accumulators can affect that. Because it could be that you only have the brakes work for a few applications (using accumulator pressure). Definitely not a good idea to taxi after landing like that.