I think you can buy a dictionary of Tang poetry appreciation from Shanghai Dictionary Publishing House (as well as a dictionary of appreciation of Song Ci and Yuan Qu). This set of books has a high starting point, but it is by no means difficult to understand. They are all appreciation paragraphs written by everyone in the literary world, which are very classic. There are many poems by Li Bai.
I don't recommend you to read poetry books now, because most of the specialized poetry books are literal translations, and the appreciation elements are not divergent enough, so it is difficult for you to get pleasure from reading poetry. As an introductory book, you will find it boring. At a certain level, you can buy poems. At that time, you can even buy the vertical version of Zhonghua Book Company.