I am a student of Chinese language and literature. Wang Li's Poem Metre or Liu Fuyuan and Yang Xin's Common Sense of Ancient Poetry (Shanghai Ancient Books Publishing House) are all introductory books, mainly introducing common sense such as rules and formats of poetry. A little deeper, we can look at the ci-poetry of the past dynasties, such as the ci-poetry of the world, the ci-poetry of Canglang, the ci-poetry of June 1, the ci-poetry of Sheng 'an, the Qing-dialect of Yuhu and so on.
If in doubt, please ask.