One thing you need to understand more than ANYTHING else if you want this idea to work:

YOU NEED ONE SUSTAINABLE NETWORK.

Do not try to get more driers or adoption everywhere at once. Do ONE city and try to get a threshold where there are enough available drivers and users to actually be sustainable by itself. Then branch out. This will take a very direct and concerted effort though.

I would read The Cold Start Problem by Andrew Chen if you want a view of the network effects this is up against. It would be amazing to see something like this succeed, but I think the hard part isn’t building the app, imo.