That's a loaded question, pardon the pun.
I'm not a big fan of jumping from gun to gun. We call it Simon's Inverse Multi-gun Paradox, aka
The SIMP Principle.
I'm neutral on the .22 kit thing, though. My personal experience is that it encourages sloppiness in grip and other recoil management skills. At the same time, it can be incredibly beneficial for working on marksmanship, reset, and gun handling skills. With the price of ammo going through the roof, it's hard to tell people
not to use a .22 kit. I just think you need to stay away from anything related to fast multiple shots. A .22 kit is essentially dry-fire with a bullet hole and slide action.
Another thing I'd recommend for someone going the .22 kit route: start and end every shooting session with your "regular" full power ammo. Put the rimfire practice in the middle. Get to the range and confirm you're doing things right. Before you leave the range, get the feel of full recoil back.