Lube it up and let it run. Really shouldn’t be much of a break in if any. I would run a couple hundred rounds through it and a box of defensive ammo. Truthfully I have never experienced any problems with Glocks and quality defensive ammo. Anything out of whack can be fleshed out with good old FMJ.OK, hypothetically speaking. Having not shot an auto loader other than my Colt 1911 and my belly gun Ruger .380 and then less than 1000 rounds in at least two years. If I did shovel out one of these G 22’s from the dark recesses of h***. How many rounds would I need to put through it to break it in. Second question? How many rounds aprx till I can trust it 100% for carry. Third question? How long till I can overcome 50+ yrs of mussel memory of revolver shooting?
I blow up a lot of 38 spc every week. Can’t count the numbers, but almost daily. To the point it’s automatic, holster, draw, double tap, holster. Till empty, reload, start over. Seems to me to possibly be an obstacle that can’t be overcome, especially under stress. It may be an unrealistic expectation.
I don’t have anything but time. And I’ve accumulated a lot of 40 s&w ammo.
I don’t think you would have any issues moving from double action revolver to a Glock. They point somewhat similarly. For that matter a 1911 with an arched mainspring housing isn’t all that different. The issue will be getting used to the trigger. But police officers made the transition and so can you.
Recoil will feel a bit different. Some people say that .40 is “snappy”. Not sure if that is the best description. It is faster and the gun seems to nosedive a bit when going back into battery. Your 1911 “pushes”.
I see no reason for you to give up your revolver. But a Glock isn’t exactly hard to shoot. In fact out of the three platforms it is probably the easiest to learn.