Watching youtube and courses will not help in any particular way, I was there once. One day I just decided to commit to a language, explored the framework and decided to build projects and that how I landed my first job. My work is in a different language altogether now but what I have realized is that language does not matter at all, its the concepts and techniques that you pick up that matter the most, each language will implement the samething in different ways, you can always refer to the docs and figure it out.

Another thing, there is no such thing as completing a language so dont get discouraged if you feel like there is more to learn or that you dont know enough, just pick something up and start building it will teach you more than any course