There’s gonna be all kinds of opinions but the Econocraft Battery 24F-E is the most basic direct swap for your rig. I have a 15 TP and just threw it in. It matches the stock specs and starts the truck. If you have lights and winches and other accessories then a battery upgrade is prob a good idea but if you’re running stock this should get you through the next 3-5 years. It cost me 108 bucks minus 18$ core so that’s only about 30-20$ a year.
Check out the Genesis Dual Battery system, it's pretty sweet if you're doing work in there anyway. Both batteries mount to the OEM location so no need to take up extra space in the engine bay