You are unlikely to learn to speak a new language perfectly, but perfection should not be your goal. Your main goal should be effective communication. I am not perfect in any of the languages that I speak, but I can communicate. And whenever I communicate in another language I’m satisfied. I also know from experience that my ability to speak and to pronounce well will only improve with time, as long as I remain alert to what I hear and read, and how I use the language.