You cannot learn properly how to use a specific library or a specific framework without mastering the programming language for which the library or the framework was developed for. You cannot learn how to develop web applications using Angular without learning properly TypeScript in advanced (for those who don’t know, software development with Angular is usually done in TypeScript). You cannot learn how to develop applications for the Android platform without learning Java first. You cannot learn how to develop using jQuery without knowing JavaScript. There are many more examples I can give. The bottom line, there are no shortcuts.

Lessons Learned from Running a Startup: The Bootstrap Way
If you consider running a startup the bootstrap way then you might get some insight from the lessons I learned.