I live in Korea, I play on na with a vpn and have had absolutely no problems aside from ping. You should be fine.
Install the Black Desert Launcher if the game doesn't start.
The launcher will appear if it's installed.
If it doesn't, try to run your downloaded launcher.
1 Run BlackDesert_Installer_NAEU.exe to install the Black Desert launcher.
2 Start the game once installation is complete.
I live in Korea, I play on na with a vpn and have had absolutely no problems aside from ping. You should be fine.