You do not have to force yourself to use the language. It's a stressful, uncomfortable and not particularly efficient way of studying a language, especially for introverts. Some polyglots study this way, some do not - it's absolutely not a necessity. Some polyglots go by the motto: "if you can understand the spoken language, and you're able to write in it, then you're able to speak in it, too".

There is no shortcut to learning a new language - even if you're fluent in 9 languages, the 10th will still take 1000+ hours. The most efficient way appears to be a loop of listening and drilling vocabulary, particularly listening to excerpts that come with text transcription.