I agree with comments above…
Less tactical looking is better
Heavy cotton is what you want. Material that “clings” to your body is usually not helpful, so you want materials that drape or fall easily. Patterns help hide the outline of the firearm. Everyone jokes about the Hawaiian shirt, but that is very nearly the perfect camouflage
As @Johnnyq60 alluded to… you can fit your clothes around your CCW or you can fit your CCW around your clothes. You probably dont want to replace your entire wardrobe. I carry a G26 probably about 80% of the time and it conceals awesome, but there are some combinations of shirts/pants that it doesn’t hide great and for those times I wear a G43 instead.
Experiment a little bit with holster and belt placement as well. I am short 5’6" so wearing on my hip at 3o’clock made me look “wider” like a troll even if the firearm itself wasn’t printing. 4-5o’clock hid well, but printed every time I leaned over or sat down. I’ve settled on appendix carry, it conceals perfectly and is comfortable for all day use. Sometimes wearing your belt just a little higher or lower than typical helps a lot too. You need to find a carry setup that works with you and your clothes.