When you’re new to CC, you feel like there’s a big sign over your head that says “GUN!!” The feeling will pass.
I wear cargo shorts all the time and wear a sleeveless T-shirt with an unbuttoned sports shirt over the gun. I started off with Hawaiian shirts because I thought the pattern would make the 1911 or Glock 17 I wore in OWB holsters less noticeable. That was a waste of time. No one’s looking for guns. No one’s going to notice any bulges under your clothes. The truth is, unless you’re a supermodel or on fire, you might as well be invisible. No one’s going to look at you at all.
These days, I wear a lot of open monochrome shirts over a 19-round XDm 9mm with a C-More STS red dot sight. I use the plastic paddle holster that came with the gun. It’s a pretty big package on my 143 lb frame, but no one ever notices.