You are on the right path!
1. Signed up on WaGuns, check.
2. Acquired 10/22, check.
3. Shotgun available, go get it!
4. Need pistol for home defense, look for training classes in your area. Find local range to shoot rental guns. Try several models.
5. Obtain CPL? If not, Gitter done. His and Hers.
6. Search for ammo. Ammoseek.com
7. Sign up for the WaGuns 2A fundraiser
8. Strongly consider getting a .22LR pistol for training. She will thank you.
You are well on your way. I'm sure others will chime in with more. LOL. GO!