How can I use ? How can I use "FYI"?? For business or casual?

How do you say in English?? How do you say "事務員” or "OL" in English?

Congratulation 20 years old! Today is 20 years old cereblation in Japan. I feel nostalgic when I was 20 years old. However how did it change of me? I don't know.... My mental has stayed from that days. Have hope for future!!

Go to shopping I went to the big sales today. That's cloudy.... I got a denim skirt and sweat. I'm happy!! I like them. I like fashion. I want more! I think was it exercised?? I'll invite my friend. I'm ecited!!!

A new year In my new years holidays I went to shrine in Kamakura with my friend. It was sooooo cloudy in Kamakura. We were waiting line for about 1 hour. I prayed for my life,and then I got a fortune paper " small luck". I felt good. I wish my life is happy! Please check my sentense. My English is not good....

about couple Don't ask one's love "would you like to be a geirl friend?" In japanese case usually asked her. What do you think about it?

Ｈｏｗ　ｄｏ　ｙｏｕ　say ”大寒波”??

Nice to meet you! Hello! I start to "italki" from today. I'd like to speak English well. Please help me.... I saw my friend , she is American. I asked her "How is your family and friend ?, it's come extreame." How do you say in English "大寒波”？？