Reddit mentions of Mel Bay Master Accordion Scale Book With Jazz Scale Studies

Right hand accordion notation is always written in reference to the keyboard, not the sounding pitch. The standard range is always the F below middle C up to the A three octaves above. It's always written in treble clef. The octave of sounding pitch is dictated by the switch indicated in the score. For an octave below written pitch, the bassoon switch would be indicated. Music played at written pitch would be indicated by a switch with reeds sounding at that pitch like clarinet or violin. Music played an octave above written pitch would be indicated by the piccolo switch.

In many cases the sounding pitch is of less of a concern than the particular timbre called for since accordions usually sound pitches in multiple octaves at the same time. If you want a good reference for how accordion scales are written out I recommend Gary Dahl's Master Accordion Scale Book published by Mel Bay. It gives a very good overview of various scales for accordion and their proper fingerings.

http://www.amazon.com/Master-Accordion-Scale-Book-Studies/dp/0786667087

I recently got Hanon for Accordion, i agree that it is really good. I also have a really good one called Jazz Scales for Accordion.

When I practice I basically try to spend as much time as I can doing scales, exercises, arpeggios, etc. and then after that just try to have fun with it so I don't get burnt out.

You can actually just learn whatever song you want (as song as its not absolutely insane) just make sure you use a metronome and practice it very slowly(like learning any other instrument really). I think that the Mel Bay and Palmer-Hughes books have such uninspiring songs that it actually makes me not want to play.

The books I mentioned have fingering in the notation, and as far as very basic technique stuff I would just read websites, there are tons of good resources.