dket So I can assume that if something isn't mentioned anywhere in the instructions, it isn't relevant?
The instructions are written by humans and are thus imperfect, but they have been used successfully by many people at this point. I think most trouble people run into results from overlooking material that is present, though it is also possible to run into trouble by following various unofficial installation guides (especially any guides that involve adb or developer options).
It is best after completing an installation to resist any urges to delete or disable applications that are installed with the system, and in general to avoid making lots of configuration changes quickly without logging them.