Uni student wanting to teach English as a part-time job

I am a uni student enrolled in an English program at a Japanese university. I am considering a part-time job as an English teacher, however I don’t know where to begin. I am fluent in both Japanese and English, but because I went to an international school my whole life, I doubt I can teach at a juku (the way they teach grammar is beyond me).

I would like some advice from anyone who has experience teaching English as a part-timer. Any form of advice would help as I am lost with the abundance of English teaching jobs available, and I can’t tell which types of jobs are good or not.