Nova Addict

Hey, im a newbie to shooting firearms (just started last week). I just bought a Benelli Supernova after doing a little research. I have a few questions about it. The Config i have is the Tactical with the ghost ring sights and Steady Grip...1) is there a way to change the stock option to the Comfort Tech Stock? 2) It feels a bit difficult to disassemble it, is thisbecause im new to shooting or is because of the make of the weapon. Any other nuggets of advice you guys may have would be great too!