It can depend a lot on your body shape. I'm six feet, 185 lbs, which is 10 pounds heavier than I was in 1985. That weight collected mostly around my waist.
That brings in the next most important thing to consider, carefully: How you carry, especially a holster and belt, with appropriate cover. If you haven't been doing that, it could take a number of tries until you find combos that work. I can carry N-frame revolvers under light cover, or two full-size or "Commander"-size 1911s. Most of my holsters are outside-the-waistband because that extra 10 pounds doesn't like things poking into it. I have IWB rigs for a Sig 239 or S&W 6906 or 915.
For revolvers I can carry two Pythons or various L- and K-frame revolvers in holsters made especially for them. A Colt Diamond back is good when I need deeper cover under lighter cover.
The key in all cases is the carry rig.
Don't overlook S&W J-frame revolvers. I use them only in deep cover, say, outdoor summer clothes in warm/hot weather, but I've never liked the reduction to five rounds. I prefer a Colt Detective Special instead. The Colt is also rated for +P ammo and heavy enough to shoot without breaking your wrist.
Since you're slim you should have no trouble finding a suitable rig that will keep your gun(s) concealed.
A relative who is active duty USAF and often in threatening civilian environments, carries a Ruger LC9 in an appendix carry holster under nothing more than an un-tucked shirt. He is 6' 2" and 195 lbs.
Hint: don't take somebody's word for what might work for you. Insist on seeing that person wearing the rig s/he likes - and moving around with it, and consider it on yourself. Best thing is to actually try it yourself, dressed as you intend to dress. Unfortunately, you'll likely start a "collection". Good trading material for gunshows.
Final suggestion: Even if a carry gun might print a little, you can add distractions. Sling a camera over your shoulder, for example. People will see it instead of a wrinkle in your shirt. I no longer wear a wrist watch, but when I did it was a large aviator's watch that always attracted attention.