Sounds like some sort of tactic satnav?
Well you are going to need an input device for the signals, the Bluetooth, the arduino(pick what ever one is small enough with enough outputs etc to meet requirements that controls everything, the motors and a driver each, with power source for everything.
The link to the drive you have been given looks excellent so get hooked to the motor on the "bench" and test it, if it does what you want with say a push button on=buzz. After that its just a case of adding the other motor(s) and the Bluetooth in stages.
Projects in electronics and anything else for that matter it is very easy to get blinded by the big picture and not break it down into the key sections.
I try to break things down this for a project input, what am I going to need to do this, how am I going to do this and what do I need to come out at the end.
So you want the project to communicate via Bluetooth, so you need something to transmit and something to receive. then just try it out, even something as simple as blinking an Led.
then output you need it to buzz two or more different motors depending on what gets transmitted, so you need your motors, drivers to control them, power for everything (can it get driven by the board or do you need external supply) and test you can make it work simply
That puts the vast majority of it together, you can communicate how you want, get the motors todo what you want, then you need to sort the code so that it works over Bluetooth and then test it as a whole