You can learn anything, but you can't learn everything 🙃
So accept that, and focus on what matters to you
— Una Kravets 👩🏻💻 (@Una) September 1, 2017
Una Kravets is absolutely right. In modern CSS development, there are so many things to learn. For someone starting out today, it's hard to know where to start.
Here is a list of things I wish I had known if I were to start all over again.