This can depend on where your assets are listed. In some exchanges, you don't need to go through the process of kyc before making withdrawal, except your withdrawal is greater than 2btc or more.
Converting your crypto currency to fiat is quite simple, and at same time depends on your countries policy. You can also try a simple p2p site which (for me) has made my withdrawals very simple and easy, i.e localbitcoins.com