I struggled with the same thing and had the same questions.
The answer where to look: Everywhere!
If you truly look around every website (okay, not every) has a certain UI and UX experience. You as a user don't pay much attention to it. But as a designer you take inspiration from it. Look at the site... what was the first thing that came in your mind... does that button work? Are there too many things on the site? Learn from other's mistakes. You also....... I feel as if I am to write a book so I'll sum up my experience.
I have done Webflow for two years. I was only introduced to website design through Webflow. What I did was first master the concepts of the development process of building a site in Webflow then took to focusing on my style. I basically looked at templates and sites about cool websites and went from there. You get a feeling for the design of today if you have spent long enough looking at it. I then opened a business. First year I was asking people to hire me, 2nd year I was so blessed as to have clients ask me to build a website for them. (and a lot of them)
I basically wrote an essay that I could have summarized in a 5 word sentence. But rather than delete it I will just keep it so you can understand my journey and perspective.
Basically, the point is learn from templates and their design (Webflow has some great templates)
P.S. If you know anybody who is a professional in UX/UI design I would get to know them better (they can help you a huge amount in getting better) such was in my case.
Hope this helps you in anyway.