If you don't plan to hunt, and don't want expensive ammo....
Just stick with .22 LR.
I know it sucks right now, not being able to easily find any. But, availability will improve soon.
Don't waste money on a rifle you won't shoot once .22 LR is available again.
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."