No, if you Activated Offchain Staking your NFTs will still be in your Wallet.
Do I need to wait to claim my rewards?
No, as soon as you have one token to claim you are eligible to.
Do I need ADA to stake? Are there any fees?
Yes, we recommend you to have at least 10 ADA in your wallet to use the staking system. There is a one time Activation Fee and a Fee to Claim your Rewards
I'm getting an error message when staking my NFTs.