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.