高校時代にオンラインで日本語の授業を受講し、初級の日本語の話し方を学び

高校時代にオンラインで日本語の授業を受講し、初級の日本語の話し方を学びました。

Results (English) 1:

When I was in high school, I took a Japanese class online and learned how to speak Japanese in the beginner's class.

Results (English) 2:

I attended the Japanese class online in the high school, and studied the first class of Japanese.

Results (English) 3:

In high school, I took Japanese classes online and learned how to speak elementary Japanese.