Its certainly doable, you just need to decide on where you want to start as a minimum viable product and tinker along as you go but ideally think far enough ahead about ideal situation so you don’t paint yourself into a corner and have to restart from scratch to get a certain outcome, although the Pi is pretty flexible for the power you’ll need.

I did this around 20 years ago (obviously not with a Pi back then) but as things changed I came round to the less hassle option of a phone and Bluetooth, particularly as I was often driving cars I couldn’t tinker with too much.

I had an implementation with a fold out 1 DIN touch screen which replaced the stereo and handled audio amplification etc and one with a stand alone hot plug 7" touchscreen. I had a reserve battery so that it stayed powered up for a short period of time after parking at home to do playlist and podcast synchronisation to my server in the house.

As other people have mentioned I was using Kodi and running audio from it as well as satnav etc. Mp3car was a good resource at the time.

Great thanks, also available for free on mobile app stores. I’ve loved all of the cube escape games they’ve done so appreciate something extra especially for free!