Rattles, squeaking noises, etc.. are inherent to our Jeeps..They can be tackled one by one..
Behind the dashboard.. Be sure no pencils and other smaller objects are falling down in the black hole at the bottom inside of the windshield.. Fill this gap up with some copper tubing closed cell pipe insulation.
B pillar rattles...Be sure the door surrounds are tightened properly and last but not least use some white lithium grease to lubricate the door latch catch plate striker contact surfaces.
After a while you will learn a lot about how to address all these "inconveniences"..
Welcome to the forum and good luck with your Jeep..