You didn't mention dual booting. I have a number of Linux based machines which started as Windows based machines because you can't easily buy them without. I'm typing this on a "Ubuntu supporting" Dell laptop. Even so, the tech guys at Dell (at least this side of the Noordzee) don't quite get it and always want you to boot into Windows if you are reporting an issue. The on-site engineers don't care - in fact they usually get excited to see Linux running on a machine that they've just fixed and want to learn from you. So when you first install Ubuntu, always agree to the dual boot option - it doesn't need to be a big partition. I will then use KVM or VirtualBox (depending on the generation of machine) to run Windows on demand in a VM because, unless it's a dire issue, I reboot for no-one...
You didn't mention dual booting. I have a number of Linux based machines which started as Windows based machines because you can't easily buy them without. I'm typing this on a "Ubuntu supporting" Dell laptop. Even so, the tech guys at Dell (at least this side of the Noordzee) don't quite get it and always want you to boot into Windows if you are reporting an issue. The on-site engineers don't care - in fact they usually get excited to see Linux running on a machine that they've just fixed and want to learn from you. So when you first install Ubuntu, always agree to the dual boot option - it doesn't need to be a big partition. I will then use KVM or VirtualBox (depending on the generation of machine) to run Windows on demand in a VM because, unless it's a dire issue, I reboot for no-one...
PS. Check out Tilix - gnunn1.github.io/tilix-web/