I never trust Fork wallets on my normal system (it might include malware). A VM is safer.
Not many exchanges accept BCD. If you want Bitcoin you'll need to send it back and exchange it, but depending on the exchange withdrawal fees might be high. In that case withdrawing a low-fee altcoin and going through a low-fee instant exchanger saves you about $15.
Warning: before doing this, it's probably wise to read up a bit and understand what you're doing before doing it. You've made a big mistake that might still be salvageable. You may not be that lucky next time.