Sign up Page - Christmas Edition

I've always been confused trying to figure out which one leads to creating an account "Sign up" or "Sign in"

So I know how hard it would be for user thinking this kind of things on our website

It's better if we replace those "techy" words with easy to understand ones

I'm that kind of guy who finds "Dark Mode" the first thing after visiting a site or an app, you could say, I love darkness, lol.

here's a dark mode for you if you're like me ;)

Like if you love it and really wanna hear your thoughts on this!