Anyone doing somthing cool with android car?

Hi I just got a new car, with Android installed, with 4G always on…
i was able to install OH app , cheers I can control my house

i want the other way around… let’s say control things in the car…
there is an option to create an Access point, i was thinking something like RPI
that will connect to AP and from there i think there is allot to do…

what do you think about to approach, maybe there is something simpler?