I need to find a digital vertual Cryptocurrance Wallet or platform

Cryptocurrance I have a few hundred in digital currency. Its a my P2P vertual Cryptocurrance Wallet its in EUR I have the amount where it came from and I would to sale or exchange it for USD as you can tell I'm new to all of this Cryptocurrance,bitcoin fiat and am trying not to get robed. I've read a lot of your information but still need some derection,guidance I guess I need to find a digital vertual Cryptocurrance Wallet or platform ???