Hi ConcreteAcorn, there are two instruments called "acoustic bass."
One looks like an acoustic guitar and is called, appropriately, "acoustic bass guitar." This is played just like the electric bass guitar, and you can use electric bass guitar method books for your studies.
The other is called "upright bass" and looks like a big fiddle. This has a completely different style of play and I would recommend using instructional materials specific to the upright bass.
Either way I highly encourage you to find a good teacher for private lessons to guide your studies down the right path.
