From the Amazon description:
It's in this picture between my Icom 7200 and laptop.
Unless you dedicated battery pack with an integrated meter, this is a worthwhile addition to a portable ham radio kit.
An online journal devoted to taking responsibility for getting through whatever life throws at us.
First off, if at all possible get her to a gun store and let her handle a few different guns, to see which one is most comfortable for her. If you can rent some and shoot them, all the better.
Secondly, compact rimfire double action revolvers have hard trigger pulls which makes shooting them accurately much more difficult. This includes S&W J-Frames and Ruger LCRs in .22. (The one LCR I handled in .38 Special had a nice trigger.)
Thirdly, compact DA revolvers in general are tough to shoot well without proper training and a lot of practice. They are often recommended for women because they are small. But between the heavy triggers on the .22s and their general difficulty to shoot accurately -- which is doubly important with a .22 -- they are most often a very poor choice for the ladies, unless they have greater than normal hand strength and are willing to practice a lot.
Compact .22 autoloaders tend to have better triggers and are in general easier to shoot than .22 snubbies. They usually hold more rounds, as well. A good example is the Ruger SR22. I picked one up a couple years ago. My now-15 y/o daughter took to it immediately and shoots it well. It is a DA/SA semiautomatic pistol that uses 10 round magazines. It's very light and has a rail under the dust cover that allows easy mounting of a weapon light or a laser. Mine has been very reliable.
If relying on a .22 for defense ammo is critical for reliability. In my experience, CCI .22 LR is the most reliable. Bulk pack .22s give the most ignition problems. My choice for .22 LR defensive use would be CCI Mini Mag solids, for best reliability and penetration.
Keep the gun clean and properly lubed with particular attention to the firing pin channel, and feed it high quality ammo, and it will serve well for defense.
If for some reason she won't go for the Charger version of the 9mm carbine, Ruger makes the 10/22 Charger. Setup as you suggested and with a Ruger BX-25, 25-round mag, that would make a formidable defensive weapon.