How can I get better at the CLI?

practice. practice. practice. Just keep at it. Compile the things you need from source and work through the problems until they are solved. Most CLI programs follow a common set of conventions which you just have to build an intuition for over time. You are learning a new language and immersion is key. Also, the CLI is merely the interface. The system is akin to the culture. There are whole set of idioms which have to be learned over time.