One thing I found with psycho-motor skills like the guitar or piano is that slowing it down significantly at the start is really helpful. I downloaded a metronome app onto my phone and I'd start out at a rate of 10 BPM (which is agonizingly slow), and then bump it up in 10 BPM, and then 5 BPM increments. The other thing I'm thinking about is getting a skilled spotter, because early on your error correcting feedback mechanisms aren't all that great. Whilst I could focus on hitting the right keys at the right time, things like posture and how I hit the keys were things where I couldn't differentiate between good and bad. Might as well start out with good form.