How did you start making good looking frontends?

I am currently learning CSS. I am decent with backend stuff but frontend is scary to me. Whenever I try to build something, it looks too ugly. To make things worse, there is so many tools and frameworks out there, it looks like something I'd never be able to achieve.

At this stage, I just want to be able to efficiently build a decent looking responsive web UI. Please share what you learnt and practice to start building good looking UI.