For the first few years after starting to carry concealed routinely, I went with OWB. That worked fine during colder months with wearing concealing clothing layers and was unnoticeable with a sturdy belt. However, during the rest of the year, it wasn't the best choice for my 5'11" 150lb frame with the grip butt printing even with a compact sized pistol.
So, I tried a couple of different IWB holsters. With any of them, you will notice it there at first, but keep with it. Like a new pair of shoes or eyeglasses, it will take some time to adjust to the new feel. Also, you may need to take some time to fine tune the exact best placement on your belt. I finally settled on the smaller Garrett Silent Thunder for my Glock 30 and Glock 19 - basically the same size holsters and pistols. Kydex exterior, leather lined interior- best of both worlds. Now, its IWB all the time -comfortable, no printing even with a t-shirt in the summer, and haven't looked back. The OWB holsters are all retired from CC, though may occasionally get taken out with full size pistols at the range .