Refactoring UI[0] is a book made by the folks at Tailwind Labs which opened my eyes to the basics of web design. It discusses in an accessible way the specific things your mention (font, color palette, basic layout, etc) and helps you build your intuition on those aspects of design.
I also recommend Tailwind UI[1], which is a software product made by the same people. Both of these resources were indispensable when I created Magistrate[2].
Now go experiment! and make sure to talk to your users.
Consistency is great and underrated, imo. User should be able to use new elements intuitively. It's better to have a consistent design vs one really good and one "eh."
Your users will thank you. IMO your website isn't an art project, just follow someone else's existing best practices.
https://www.uxdatabase.io/free-product-design-course-curricu...