The best advice I have is to go to
PSR Tutorial , join the forum, click on the Lessons Tab and explore this incredible keyboard in depth.
As for the keys, don't worry about the keyboard not feeling like a piano--it's an arranger keyboard. Pianos should have the key feel of a piano--not arranger keyboards. After a while, you'll forget about the piano, and with luck you'll be posting some beautiful music for all of us to hear.
Good Luck,
Gary
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Travlin' Easy
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)