There are lots of things I want to talk about but I'm not sure how to say it in English. I'll think about it and prepare what I want to say by the next lesson.
「色々言いたい事があるけれど、今は文がまとまらないから、次のレッスンの時にお伝えします!」= There are lots of things I want to talk about but I'm not sure how to say it in English. I'll think about it and prepare what I want to say by the next lesson.
ボキャブラリー・フレーズ
There are = ~がある
lots of things I want to talk about = 色々言いたい事
I'm not sure = 私は分からない
how to say it = 言い方、伝え方
in English = 英語で
I'll think about it = 私は考えておく
prepare = 用意する、準備する
what I want to say = 言いたい事
by next lesson = 次のレッスンまでに