Linux is vastly superior. I’ve been on Linux desktop for over 20 years now, I’ll never go back.
As a typical example: this weekend I install Linux (with download and making iso) takes 20 minutes, I install windows (first time in decades, something for my son), took fucking 6 hours, 14 attempts, loads of problem searching on internet.
Having said that, there are some things to keep in mind. Linux mostly (to users) is slightly different on a few details, and because of Microsoft, there are some things to keep in mind.
You’re a lawyer, so you might have to deal with Microsoft documents. Those you can process with LibreOffice (I don’t like it very much, like Microsoft office), google drive (works very nice, but is still closed source, google) or your own hosted linux server with nextcloud and only office (a bit harder to setup but then it’s all yours and under your control)
Look into any closed source windows applications that are required. Most windows programs run also under Linux (wine, proton, and these days various other solutions up to a virtual machine with windows for those few exceptions that won’t work on Linux for some reason)
Video formats are non-issue, Linux eats everything and mostly out of the box.
Then, Linux has distributions. See it as different car brands. They’re all cars, based on the same tech, just different brand names that do details slightly different. You gotta choose a distro (distribution). I HIGHLY recommend either fedora or (my person Lal preference) a Ubuntu variant. I personally have been using kubuntu for over a decade now. The graphical user interface works mostly like windows (just better) and most programs have Ubuntu ready Linux versions available, making installing them super easy. Install VirtualBox (free, as usual) to run windows in a virtual machine if needed, and setup multiple desktops so that you can easily switch to a windows desktop when needed (hopefully, and likely, never)