What should I do if I can't understand the meaning of the poem and the thoughts and feelings expressed in it?

First, you can collect some basic materials of common poems, such as willow, phoenix tree, wild goose, partridge, … and other flowers, birds, fish and insects, to express your feelings and artistic conception.

Then learn more about the lives of some famous poets. For example, ta's life is divided into several stages. What is the prophase and what is the anaphase? Try to know people and explore the world.

If you accumulate more, you will be handy.

I hope I can help you.