G23 is a big jump to start everyday concealed carry at work with a tucked in shirt. I would save a lil change and find an LCP, or the like and just pocket carry. If you can find a comfortable way to carry a G23 props to you. As Xmanhockey said, your best bet is the smart carry rig or a tuckable IWB.
With that said the G23 is a fine all around firearm, congrats!!