Thunderbolt 3 (USB-C) to Firewire connection

Again, thank you SO much for your help with this problem. My old 2009 MacBook Pro has a mini display port as you pictured on the right. That port, I believe, outputs picture only, not data.

I'm trying to connect the FireWire port on that computer to the Thunderbolt 3 port on my new one, see below.

Maybe you meant I could use the Apple Thunderbolt to FireWire Adapter and then plug that into a Thunderbolt 2-to-Thunderbolt 3 (USB-C) adapter, using two adapters connected to each other. Might work. But you'd think someone would sell a Thunderbolt 3-to-Firewire adapter. Since I can't find such an item sale anywhere, I wonder if it's even possible.

Thank you.

I wanted to use Migration Assistant to move my info from my old computer to my new one. It's over 1TB of stuff. I ended up using an ethernet connection but it was still over 24 hours before I could use my new Mac. I know that Migration Assistant works over WiFi but that must take even longer. I was thinking there must be a faster solution. I would also like to use a firewire connection in the future for backups.

Thanks. The Thunderbolt connector doesn't look like USB-C. More like mini display port.