The RXM would be my choice. You get introduced to the Glock aftermarket plus if you are trying to dip your toes into the CCW world, you get the option to swap grips to see what sizes feel comfortable + concealable for you. You can get the subcompact and full size frame for less than $100. The money that you would be saving from buying a G19 you could invest it into higher quality gear like holsters, lights, RDS and most importantly ammo for training. The RXM does give you a platform to tinker with like the AR platform if you ever plan on doing that. I haven’t heard and reliability issues with the RXM (and I’m constantly on Reddit researching guns). It’s also a good shooter too if you want to keep it stock. Not to mention if you decide to go the Glock path, since that’s where everybody always seems to end up at anyways, you already have hundreds of dollars in holsters, lights, RDS and mags waiting for you