As far as self-defense, a 22 is better than nothing and may be all that some people can handle. However, a 9mm & the lesser .380ACP are far superior in stopping power compared to any 22. Bottom line: If you’re looking for a self-defense caliber, go bigger than 22, if able.
I carry a Ruger LCP 2
Shot placement for me is most important. CCI rounds...22 with extra mag
Very concealable, reliable and accurate within 10-15 yards.
As you said, something is better than nothing.
More concerning than the stopping power of 22lr is the notorious unreliability of rimfire versus center fire.