That sounds like a really good plan. If the installer can use your wifi and get online, then you should be golden.
Download [the handbook] onto another device so you can have it handy when you're setting up your GUI of choice. It's quite well-written, and there's only a couple steps needed to get the GUI going: from memory, it's just a matter of installing and enabling the right video driver, and of course the GUI programs/desktop/environment you want. I'm running sway (Wayland) happily on it now, I know other folks have gotten KDE Plasma working.
Expect not-wonderful wifi speeds, but it's fine for casual browsing. Newer intel wifi chips might do better because of newer drivers. It's something they're actively working on.
If the installer isn't able to get online, you may run into problems, and might need to try a cheap USB dongle or try a different USB, or some other solution. But thinkpads are usually pretty well-supported. This x260 has been perfect.
If you get stuck, just holler. Lots of really friendly and helpful #FreeBSD folks on fedi! #OpenBSD and #NetBSD, too!
