hi and welcome..
there isn't really a 'quick' way into the vast world of acacias, except, i guess, mail ordering A. confusa bark, (which is possible though technically illegal in aus, and supplier discussion is not allowed on this site) and following the Thick-Light tek or cyb's tek (google search nexus)
..if you have the time to study, then there's the 80 page acacia info
thread...most answers are somewhere in there..
.