1500 interior

Howdy, I'm new to the truck world and about to jump into a 2013 1500 Crew. My years of car driving says 'get buckets!' but my practical side says 'having room for a 6th person up front would be hand for toting kids and friends to soccer games'. Not having much experience with long time...

i have my ram you can see what it is by description i want some engine upgrades and interior. engine wise i have a cai tb spacer and super chips programer what else can i do on about a 500 budget and keep my 10mpgs lol also interior has the following a 8 inch sub under the back seat camo seat...