I wasn't able to take your lessons for a while, because my six-month old daughter was crying very hard in the evenings.
I am happy to be able to take your lesson again.
ご質問ありがとうございます。
① "I wasn't able to take your lessons for a while"＝「しばらくあなたのレッスンを受けることが出来ませんでした」
"because my six-month old daughter was crying very hard in the evenings."＝「私の生後6ヵ月の娘が激しく夜に泣いていたので。」
② "I am happy to be able to take your lesson again."＝「あなたのレッスンをまた受けることができて嬉しいです。」
ご参考に。
アメリカ合衆国 
