2014 SR5 audio upgrade

So I'm having a hard time figuring out what I'm looking for I have emailed tech12 from the site never heard anything back but I am wanting to upgrade my system. But I don't need the neighbors to hear it but I want something decent. I listen to rock and country and the stock unit has zero bass, no way to even adjust anything and now the clock don't work and I really want android auto, and it would be nice to get a front camera also.

I know these factory systems are not just plug and play and there are a bunch of sites that specialize in a full system but these huge subs and stuff seem a bit overkill for me but the stock system is way under.

Is there a full speaker upgrade and tweeters plug and play system, I was thinking if adding the sound dampening in the doors. And I'm not against replacing the Amp for just the door speakers and tweeters just not sure I like the of a big sub behind a carseat. I have two Littles in carseats. Crutchfield is another place I keep looking but some things I read mention that just replacing speakers for ones that fit will actually make it sound worse.

I am good at wiring, and good at directions but I'm not finding a thread with a similar question. Or at least not know exactly what to search.