"You don't know, what you don't know" - which applies to everyone, but especially beginners.
That's why a flesh n blood teacher is still relevant in the internet age. Imho, A experienced teacher should be able, in the first lesson, to assess where you are, what you need to know and guide you to that info.
I had a mate start guitar over Xmas - she popped around and I sat with her for a hour. First thing, Posture, options on how to hold a guitar. Second, rhythm - for her - I figured I could skip my noob's intro to rhythm - her's was good. Third, was chords.
Then we went onto questions - Is she in it for a good time or a long time? What sound/band does she admire and want to play? That resulted in me showing her drop D, using a basic Nirvana song and letting her mess around on my amp with delays (she loved that)
I didn't mention tabs - but it's in the top 10 things, just not the top 5 things I think she needed to learn. For you it might be different - that's the secret sauce that a teacher offers.