the basics of coding is less the language, but more the algorithms and pracices.
knowing concepts like object oriented programming is language agnostic. how you learn OOP can be done with several languages, usually most commonly with Java or Python, but it fundamentally doesnt matter for the common languages for the most part.
OK but that still doesn’t help me go from “I know the difference between integers and floating point variables and how to make loops” to “Hey Mom here’s a new house I bought with my stock options from my startup”
hemce, in your case, you trained for a job which is something you do to get money.
if you want to write an app, go lool up guides or classes on the type of app you want to write. not everyone takes said class because it may be irrelevant to their field of programming.
the only thing they will typically all share is basic understanding of variables and object oriented programming.