0, it is too difficult to spend N2 in July. Unless you have a Japanese teacher to teach you pronunciation, a teacher from China to teach you grammar, and a good Japanese environment, take your time.

The date is good, but the grammar is very complicated, because it was written by teacher China. There is a book called みんな Japanese, which was written by Japan specifically for foreigners to learn Japanese. Very good, the teaching AIDS are no less than the standard days!

There are many websites, the Shanghai Beach upstairs is good, and there is a gentle Japanese, which I have used myself and I feel ok! Finally, I hope the landlord can learn as soon as possible!