Junior high school student preparing for senior high school

Hey i’m at third grade of junior high school right now and i want to continue to a prefectural high school. Junior high school ends in just like 4 months and my Japanese is still really bad. What are my options? Because i’m a foreigner, I’m only going to do 3 subjects for the test. English, Japanese, and math only. Well i probably can do english. Math is supposed to be easy but the questions is of course asked in Japanese. And for the Japanese subject, i really have no hope for it. can someone give me tips for learning?

Today, i heard that there will be a high school entrance interview too. What kind of questions they will ask there? is there any hard questions that will be asked there?

by khalibu26