Hey folks, newbie here, both to the forum and to automobile audio/video/nav systems. Don't know one bloomin' thing

Just bought a new Dodge truck, and intentionally didn't get the factory nav system or bluetooth. Now I have to rely on someone to tell me what to put in for an audio/video/nav, and/or maybe even computer system, and/or whatever..............
I'm looking for some real experienced help on this. Specific systems are what I have in mind. If you start bombing me with a bunch of technical information I'll go into meltdown.
Thanks for any help you can be.