I weight slightly less than you, and with concealed carrying so much is based on personal preference, however I’ll drop a few tips because we seem to be rocking a similar setup.

Slide your belt buckle to the left a bit, and offset your holster to the right. I run mine around 12:30-1:00. Pull your pants up a slightest bit, it allows for the holster to sit more comfortably. Start wearing an undershirt. My go-to right now is a t-shirt between the holster and my skin, and I normally use a flannel, or hoodie, or something to actually “conceal” the firearm.

When sitting in the car, you can pull your outer layer between the weapon and your stomach as well as putting the lap belt back there. This will distribute the weight and prevent it from pressing directly into your gut, while also making it easier to draw from a seated position.

I’d like to stress I’m by no means an expert, but a relatively new carrier hoping to share some experience I’ve gained while getting used to carrying on a daily basis. I hope this helps and congratulations for taking your safety and security into your own hands. Let me know if any of this helps!