To echo another commenter - What's stopping you?

OpenBSD is super easy to install and set up, provided you do a little homework and make sure your hardware is supported.

I have it running on an old think pad and it's a great daily driver. The only thing that gets in your way is that you're going to be missing a handful of applications you might want to run, particularly anything using electron. But there are enough application out there, that you should be able to find suitable alternatives.