Add a 3rd lesson to it Janambo:Leave the split point on F# where Yamaha put it on your keyboard (just joking
).
If your right hand notes of a specific song are "entering" the left hand part,you can always "move" the right hand voices one octave
down and play the song in one octave
higher than you sheet music indicates.
That way you will play e.g.the piano voice at the octave of C4 with your right hand but you will actually hear like playing at the octave of C3.
But keep in mind that now your right hand has lesser keys to play that way and if you need to play a song with a melody line in 3 octaves you may have a problem.
(You will not have this problem if there is a small "break" in the melody so you can press another OTS or registartion button with the same voice but in a different octave).
The one who wrote the book maybe he had a keyboard with 76 keys but you have only 61 keys
Another way could be to play the song in a different key in order to maximize the right hand's availiable keys.