tnb77;
You will, oddly, find the Glock subcompacts not much easier to carry. The better IWB holsters have a "tail," extending downward to prevent the gun/holster combination from being too butt-heavy and wanting to climb upwards. The thickness is the same between the two platforms, so there's no savings there. The shorter grip helps to prevent printing, but typically only without the use of extended floorplates.
If you look at a design like the Milt Sparks Versa Max 2, you can see how the belt loops being so far apart spread the weight of the gun over a wider area. And, not being on the side of the holster, allow for a thinner package. Plus, the angle of rake helps keep the butt from digging into the kidney area when worn at 4-6 O'Clock.
Being new to CCW'ing, you will adjust to the weight and size of anything you would reasonably try to conceal. Get a proper belt (look at belts designed to support a firearm), along with a top-tier holster and life will be much better.
I'm not affiliated with Sparks' holsters, but have used them everyday for almost 30 years and love them.
John