How are you? It has been a while... How is your family? Yes, I have been learning English more intensively these days and the reason why is simple. English is one of the most wanted skills on the job market. Plus, English is the lingua franca of the world. Because of these two reasons, I should put as much effort as I can into learning English. There are also other reasons that I could tell you about during our next family gathering which I can't wait to have next month.

Yours with love,

(Then sign your name)

Nice job! I only have a few corrections for you! In your last sentence (There are also other reasons that I could tell you about during our next family gathering which I can't wait to have next month. ) It is a correct sentence, but if I was writing it myself, i would probably say this:

There are also other reasons that I could tell you about durring our next family gathering. I am looking forward to it next month!