Lyft Amp, bluetooth, navigation and audio

I have a Nexus 5X and I drive a 2016 Honda Fit. When I’m in the car I can’t hear the navigation instructions if I have bluetooth turned on. So I never use bluetooth when I’m working because I won’t hear navigation. However, the Lyft Amp requires bluetooth. The 2016 Honda Fit does not support Android Auto, so that’s not an option – I already tried it. Is there a workaround or should I forget about using the Amp? These are specific requirements, but maybe someone else out here has the same and I’m just looking for advice. TIA!