imo you should, before nuking your account, make a backup of everything you said, and maybe some of the surrounding context, and then host it on a website. Just make sure your website is all properly indexed, and shows up when you use the right search terms. I have no idea what the legality of such an undertaking would be, but it would be cool. Or, if you don't want to bother with that, you could try writing some blog posts based off of the correct answers you gave to obscure questions.
But really, it all depends on what you did with you Reddit account. If you answered people's obscure questions, you should keep that information. Would someone look up a question you answered? Did you talk a lot in more technical subreddits? Did those arguments you have result in any positive change? But if you spent all your time on big threads with thousands of other people replying, or did a bunch of lurking, maybe your account isn't worth keeping.
If you account is only of value to you, maybe just downoad a copy of everyhting you've said on there, then nuke your account with some tool.
Exciting! Sort of interestingly, I never dual booted or anything, I just jumped straight to Linux.
Honestly, it's really not that bad. Linux has come a long way since I started out, and while I usually make it harder for myself than it needs to be, I've seen young middle schoolers installing and using Linux, I've seen retired professional musicians with no technical background install and use Linux. Especially with all these new fancy atomic desktops, like Silverblue, Bazzite, and Kinoite. Admittedly, I have managed to break a Kinoite installation (doing stuff I probably shouldn't have been doing), but fixing it felt magical. Just roll back to when it wasn't borked, then update it.
I did a lot of not so nice things to that installation (it was a bit of a test, to see how fragile it was), and it's still running now!