I will begin writing my diary entry in English.

I'm studying how to translate English into Japanese. I hope to improve my English writing skills, so that  I will be able to study Japanese-English translation. First of all, I need to make sentences in English by myself. Here, someone would correct my sentences when I use strange words or writing something wrong phrases. And I also hope to be a friend with English speakers.

I am going to keep a diary in English. (With diaries and journals, we often use "keep")

I'm studying English to Japanese translation. I hope that if I can write better in English, it will help me study Japanese-English translation (are you translating from English to Japanese or from Japanese to English?  or both?). First of all, I need to make English sentences by myself. Here, someone can correct my writing when I use strange words or incorrect phrases.  I also hope to be friends with English speakers.