こんにちは。I'm a native Japanese speaker. I attended Osaka University where I majored in Japanese teaching. In the university, I studied how to teach Japanese to foreign people. I think the most important thing is to relax and enjoy the lessons.
After graduating, I worked for a localization division of a Japanese Game Publisher in Osaka for a period of 13 years. My duties involved the translation (from English to Japanese) of in-game content and manual booklets for more than 100 games.
I understand there are many Japanese phrases that cannot be translated literally to your language. Also, Keigo (Honorific) may be complicating.
I'd like to think with you what is the best way to learn the language for you.
It may be to read Japanese manga (comic books), to watch Japanese movies, or to discuss some topics of Japanese newspapers.