I am unsure at this VPN -> TOR notification, would you mind clarifying it for me please? At the moment if I start up my VPN client and wait for the connection

I am unsure at this VPN -> TOR notification, would you mind clarifying it for me please? At the moment if I start up my VPN client and wait for the connection to my very trustworthy VPN provider, and only then open to Tor Browser Bundle, is that the right way round? Thanks for the clarification.