Just a quick, favorite tip about Google Maps on mobile… After searching for a place, and getting its location on the map, it’s pretty normal/common to hit the blue “Directions” button – THEN tap the “Start” button. Instead, just tap-HOLD on the “Directions” button, and Google Maps will automatically start your driving navigation.
Sure, it only saves a moment, but sometimes after tapping the “Directions” button, Maps can take a “long” time to come up with different routes for you to choose from… although for 99% of trips, you just want the fastest route (which is the default,) so you might as well just skip the option for other routes. I use this 99.9% of the time now, and it works great.