These 2 sites will help you a lot. http://www.studybass.com/ http://scottsbasslessons.com/
Its easy, you just have to put work in. Remember B
ish. There are no sharps between B
or between E
Learning the Major and Minor Triad patterns will start making a lot of sense of it, and is explained very well in the 2 sites I listed. Check those out and report back to us
The higher register makes for a great tool to add dynamics. I use it a lot in song intros,endings, slides from low to the same note an octave up on big builds, not just for Jazz and soloing.