Install WireGuard
Make sure WireGuard is installed first: https://www.wireguard.com/install/ . It should not be necessary, but will allow you to troubleshoot, and also makes the speed faster, because you will be using Kernel WireGuard.
Reinstall Netclient (if applicable)
If you install WireGuard after Netclient, reinstall the netclient.
Verify interface with wg
After joining network, run wg to test if the interface is running and bytes are being transferred.
Pull configuration if no peers
If after 1–2 minutes there are still no peers when you examine the output of wg, try running netclient pull. The peers should now show. It may take 1 minute before bytes are successfully transferring.