There is more to ccw then just the holster. IWB holsters need to stay put so you don’t need to re-adjust the ride. Your pants require an additional inch of room or you can’t be comfortable. A good stiff belt helps support the extra wieght of the gun. Tight fitting shirts will print the gun as well, so will thin material. Casual dress makes things a bit easier. A sweatshirt or a shirt that hangs low enough to cover the gun sitting or standing looks normal.
However when you want to go out in a dress shirt tucked in, well now you need a sport coat. Only you can’t take it off when someone asks if you’re hot with that on.
Greetings with friends, everyone wants a hug. How do you keep them from putting their hand on your gun? I try to direct their left arm upwards.