What knowledge is necessary?
How do I locate missing knowledge? I am aware of things like scales, chords, arpeggios, etc. I guess it would depend on what style I want to play.
Start with a beginner book ... or perhaps some beginner tutorials on Youtube. Try Yousician or something like that. Make the learning fun and you'll be playing all kinds of great things before you know it.
If you know all your barre chords, the minor pentatonic scale and the blues scale you are all set to get yourself in a band or start to jam with other players. I've taught numerous students who have been doing that for years before they eventually come to me looking for more knowledge. That's not to say you shouldn't be thirsty for more learning but there is so much mileage you can get out of those scales before you need to move on.
Lachlan Horne. Guitar tutor for 40 AMAZING THINGS YOU CAN DO WITHT THE MINOR PENTATONIC SCALE web tutorial - Free lesson at guitarscalesthatrock.net/gf.html