man. you've got some fun times ahead!
can't pick one, so here are my personal favourites:
Mingus Mingus Mingus
Blues and Roots
Charles Mingus Presents
Mingus Ah Um (should be in every jazz cats collection)
Charles Mingus Sextet with Eric Dolphy
all of these range from a solid 8/10 to absolute perfection/10
if you're totally overwhelmed by the above, start with Mingus Ah Um.
nice one man