IMO it’s really difficult to improve Japanese speaking skills if you are not in Japan.I studied in a Japanese college using Japanese books,taught by Japanese professors at my homecountry for 3 years.I passed N5 afterwards,but my speaking was a messed.I started using conversational Japanese to the parents of my students that gave me a platform to use the language (but still 😕).I came & teach here in Japan & my speaking skills skyrocketed. IMO ,daily spoken Japanese is way different from JLPT.