First, English is not a problem for you. Your focus should be on tour guides, that is, basic tour guide books.
Second, it is not a question of grammar or problem solving, but a large number of names of Chinese and foreign places of interest. Their proper nouns are big and long.
Third, about comprehensive English tour guides. Finally, you will have an oral exam. Explain a scenic spot in a past life in English, and n related things about it. Here, you should not only have the skills of a tour guide, but also test your oral English and the memory of a large number of professional vocabulary.
hope this helps
bless