In America it is illegal to keep a wild crow or raven as a pet as they do fall under the migratory bird act. You can get a permit to care for one that needs rehabilitation for 6 months, like injured or chicks, but that comes with it some requirements that you will not easily meet. To indefinitely own a crow or raven means a special permit that is also very hard to get.

You can legally own a non-native crow or raven, but they are loud and messy. Also they cost thousands of dollars to buy and need all the space you came give them. Their social needs are arguably more than a parrot, so you basically have to have someone home all the time. If you are thinking "I'll get two! Twice the crow friends!", not ideal because they will favor the other bird over you and there may be other issues caused by having multiple crows.

Heartbreaking, I know, I wish I could have a pet raven too. The reality is that, legality aside, it is best to make a wild crow/raven friend if you want to experience them up close. They are pets that demand a lot of you in multiple ways that you almost certainly can't provide. To love them means you want to provide them with the best life and that means letting them be wild and visit with you when they feel inclined.

Make a crow friend, don't buy a crow pet.