As for you fingering the ivories, practice DOES make perfect.
Glad to see you questin for average status - I plan on reaching that this month!
And I know about practise making perfect on the keyboard - like I said, even the songs I can do well, like Let It Be and Things We Said Today, take some doing. My wersion of TWST is quite different to the original. Mine is more blues-jazz borderline type - it's the sort of arrangement it would have if someone like Ella Fitzgerald sang it. I use a drum pattern on my keyboard, and the piano voice, and sing accordingly. No change to the melody or chords or anything, just altering the arrangement to suit my requirements
The difference between genius and insanity is merely the difference between success and failure.