It will simplifying the learning process. And its manageable to learn. So break down css topics and learn
2.Learn and Build
Start building projects. Really it will help you to improve your knowledge. Learning by doing is best way to learn.
3.Take Notes
Note taking helps as you're able to revert back to your notes when you're feeling stuck.
4.Practice
There are a lot of sites where you can sign-up and start doing challenges, sometimes you're able to use the projects you build as part of your portfolio.
5.Open Source Contribution
Open Source Contribution helps improve your skills, the coolest thing is that you can add it onto your resume, you also get to network.