SS215, take two steps to learning your G26.
Get an Advantage Arms .22 Conversion Kit. You will get everything when shooting except noise and recoil.
I always shoot a few rds. of full caliber,install the kit and shoot a lot of .22s, remove the kit and shoot another few rds. of full caliber. Doing it this way keeps me accustomed to the noise and recoil.
Second step is to get a Gas Powered Airsoft copy of your 26 and shoot it at home anytime you want.
Airsoft BB's are cheap and you can use Coleman Propane to power it at less than $3.00 per bottle. In warm temps, I can get over 6,000 shots from a bottle.