Disklavier

I have written my own song with lyrics.  I am not a very good pianist.  I am trying to transfer the recorded song from my MarkIII DC3A Disklavier to a computer program so I can edit my mistakes, print sheet music and then copyright/register the song.
 
I have a Yamaha UX16 MIDI to USB adapter so I can connect my piano to my laptop.  I have moderate computer skills.  I just do not know what program I should use to edit the MIDI file.  I was looking at programs called 'ANVIL Studio' and Magicscore Maestro7, but it is difficult to know what is a good program if one can barely read music.  I need something that is 'user friendly' that can edit the mistakes I make while recording my song.  Then the program has to produce and print the sheet music, etc.
 
Any advice or suggestions would be very welcome.