Mahler's 5TH Symphony

[Eduardo Barbosa]

I am wondering if anyone here has experience with Mahler's 5Th Symphony.
I am trying to figure out how to approach learning this piece.
It has a lot of notes, it's a very long piece, and very demanding technically.
I work full time playing mostly Jazz, and I also teach. So my time is somewhat limited, although I am making as much time as I possibly can in order to play this piece.
I am wondering if anybody care to share some tips, suggestions etc.
Thank you in advance.