Is my English strange?

It i。けさ costing a lot to attend English conversation class. I would say It is costing me a lot to take an English conversation class or course.
英会話教室に通うのにかなり費用がかかっています。

I wish I wanna live in Hawai but I've heared it costs a lot to live there.  I would like to live in Hawaii but ot costs a lot to live thgere.
ハワイに住んでみたいけど、かなり費用がかかると聞いたことがある。

Why were you late for work?
何で仕事に遅れたの？
I'm sorry because traffic was so heavy this morning. I am sorry. Traffic was heavy this morning
ごめん 、今朝はすごく渋滞してたから。

Note: Highlighted would sound slightly better where thgere is a highlighted sentence.