Why is listening the major and the hardest skill to master?
While learning a second language we prioritize the image (the written word rather than the sound).
We stick to the known and refuse or keep away from the unknown> listening is not safe. Reading and writing is safe and easier.
Why do you learn a new language? Are you planning to write a book or do you need to communicate with other human beings? with a different worldview and his/her own cultural background?
I am a self taught writer however I can’t help with your book, but if speaking Spanish confidently and getting rid of your foreign accent is in your bucket list, so, here I am.

Gmail me and I will determine if I can help you the coming enero (January).