你好！我傢家有五口個人。，包括媽媽，、爸爸，、妹妹，、弟弟，和我。我媽媽是醫生。今年我開始復複習寫中文(國字)漢字。，但是我寫漢字寫得很慢。

你好！我家有五個人，包括媽媽、爸爸、妹妹、弟弟，和我。我媽媽是醫生。今年我開始複習寫中文(國字)，但是我寫得很慢。

We don't really say  "漢字(han-zi)" when talking about Chinese or the characters. It sounds more like Japanese. I learned a little Japanese, whose word system includes "平假名(ping-jia-ming)", "片假名(pian-jia-ming)", and "漢字", but I never used "漢字" to say the characters of Chinese. I only say "國字" or "中文". "中文" is broader, and "國字" is specifically used when talking of the words.