New (to me) 2012, first time truck owner

Hey all, I bought my 2012 RTL a few weeks ago. I stalked around the internet looking for solid deals and finally found this one almost three hours away in Youngstown, OH and only ended up paying $11,500 with tax, tag, title etc. It's high mileage (198.5k when I bought it) but runs really well and only had one previous owner. It's clear by looking at the scuffs in the bed and some of the wear to the interior that it was a work truck, but on the whole it's in pretty decent shape. So far I've done some basic preventative maintenance just because I don't know what all the previous owner had and hadn't done. Carfax just showed the rear differential was replaced around the 160k mark, so I'm getting ready to have the timing belt & water pump replaced just in case, and the valves adjusted because there's a slight chattering noise under acceleration.

Looking forward to learning a lot and hopefully being able to share some solid knowledge of my own eventually.