If you don’t have prior experience with Linux, I’d advise making the switch before the end of win10 support. I made the switch a couple of months ago with no experience in Linux, and while it wasn’t a horrible experience it also wasn’t the easiest thing to do. Having the safety net of a Windows partition was really useful during the month or two as I got used to Linux, which I wouldn’t have wanted to do with Windows not in support anymore.
If you don’t have prior experience with Linux, I’d advise making the switch before the end of win10 support. I made the switch a couple of months ago with no experience in Linux, and while it wasn’t a horrible experience it also wasn’t the easiest thing to do. Having the safety net of a Windows partition was really useful during the month or two as I got used to Linux, which I wouldn’t have wanted to do with Windows not in support anymore.
My experience is limited, but not no experience. In any case, it’s not like Windows 10 will be immediately unusable when support ends.