I took a lesson of writing good resume and CV in English at Ikebukuro, Tokyo.

I guessed that younger people would take this lesson before taking it, but other students are older than me.

Teacher Adam is from Philippine. He is energetic person. He works in IT company week day, and teaches English at weekend and holiday. Then he enjoyed triathlon. He practiced it every day. He said he participated in triathlon race in Barcelona.

The lesson was very productive.
I understood how to write resume in English. But I need more practice to write a good resume.

I thought that it is good to go to places I would not normally go on and concentrate and study one theme.
聼起來自然嗎?

I took a lesson for improving my resume and CV writing skills in English at Ikebukoro, Tokyo.

I assumed younger people would be taking the same class before I started, but the students ended up being older than me.

My teacher, Adam, is from the Phillipines. He is very energetic. He works for an IT company on the week days, and teaches English on the weekends and holidays. He also enjoys triathlons. He trains every day. He said he participated in a Triathlon in Barcelona recently/before.

The lesson was very productive. I developed a good grasp of how to write resumes in English, but I need more practice to perfect my skills.

I think that it'll be good for me to go places I'd normally avoid and concentrate on my surroundings while studying one thing at a time. (I didn't know how to translate this last paragraph because I'm not sure what you mean entirely)