I've played the guitar and various instruments in brass bands all my life, and although tuition helps with technical development, you can't really beat your own ears. Learn some chords and listen to music, eventually it will click with enough practice and you'll be amazed to find yourself playing difficult pieces of music without even stopping and starting.

Youtube is ace if you want to learn chords or specific pieces of music, plenty of videos that break songs down with close ups of each and every chord