bash script openvpn, wait for output, ssh server, end openvpn

I want to use a bash script to start an openvpn connection and once I got the tunnel established start an SSH terminal connection to a server and once I close the SSH connection also close the openvpn connection.

For the start, I tried implementing the solution proposed at https://stackoverflow.com/questions/21001220/bash-sequence-wait-for-output-then-start-next-program as a shell script

#!/bin/bashexec 3< <(sudo openvpn --config  /etc/openvpn/server.ovpn)sed '/Initialization Sequence Completed$/q'<&3 ; cat <&3 &ssh server

I run this script as sh ssh-vpn.sh in the fish shell.

As a script, this gives me a syntax error line 2: syntax error near unexpected token '<'. outside of the script, I do not get this error.

Also, not using these command as a script, I occasionally seemed to have gotten error messages because the file descriptor 3 was already existing.

• How to avoid the syntax error in the script?

• How to extend the script so that it automatically closes the openvpn connection afterwards?

• How to ensure the file descriptor gets closed at end of script?

I apologise if this is too much for one question - I guess this is one of my first scripting questions for a long time and I still have to learn much here.