Much of success boils down to doing the real thing and not an imitation of the real thing.
For example, if you want to learn a language: Start with full immersion. Speak from day one only in the language, except for work, friends, and family. The alternative is to download an app, listen to a podcast, and maybe you'll converse on occasion but may never communicate in the language at all.
To start, ask yourself how you would do this if doing it well was all that mattered.