How should a beginner learn to appreciate or understand a poem? Is it not good to search for professional analysis immediately when I can't really feel anything particular after reading it? I don't have a good sense of appreciating poems.

Ordinary Genius: A Guide for the Poet Within by Kim Addonizio

Read the poem aloud. Sometimes I try to recall what I have read and see how the order of words is different. Thats one way I learn how the poet has used a different order of words and even the choice of words. As you understand the structure of the poem and you zone into it, you will get a good sense and state of mind of the poet. After this, feel free to do all the research.