How migrate Thunderbird from Win11 pc to different Linux Mint pc?

I'm abandoning Windoze for Linux Mint Mate. The original Win11 Laptop is still available - no cloud connection, the Windows account exists but is unused. The laptop has all my Thunderbird v146.0.0 (64 bit) mail, address books, calendars. I have a refurbished PC, came with new-install Win11. Now dual-booted as a Linux Mint 22.2, Mate desktop. The Win11 partition is unused and will stay that way for the foreseeable future. I use gmail since TalkTalk finally terminated access to my Tiscali account. (I dropped TT many years ago.) I've setup Thunderbird on Mint, can't see how to find its version. It came from the Mint default setups. Gmail is working but missing all the 'Local' stuff. The calendar has a few of my auto-repeat entries but none of the random ones. Some of my address books are missing. I remember from the Win10 > Win11 migration that I need to move the 'profile'. It will be large but I have big-enough USB memory keys. And no, the machines are not network linked. I don't trust Microsoft and won't allow any of their corrupted stuff any access to my new kit. Guidance needed: * What needs to be moved? From where on Win11? * Where to put the stuff on Mint. How to migrate it? * Any problems to watch out for? Help please? Links to resources? Forum posts, online guides, wise words? Or 'just do it this way!' TIA PeteS