I'm the last guy to recommend a 10/22, but out of those 2 choices, that's what I'd go with. In spite of endless threads about 10/22 modifications on CGN, a stock 10/22 will actually shoot all on it's own.
As a first .22lr, I think semis are not a good idea. Bolts are more accurate 99% of the time (R-55 guys~calm down

) and teach you to make every shot count. They're also 100x easier/faster to clean, fewer parts, etc. etc. Take a look through the rimfire forum at threads about failure to fire (FTF) failure to eject (FTE)...magazine issues, slipping scopes, inaccurate barrels, you name it, then see how many of those threads are discussing bolt action rifles.
On a positive note, 10/22s (and 64s) are both so popular that you'll have a massive body of repair experience on this forum and others, so if your lights are on, you should have no trouble finding the help you need in the event you need it.