You can download the content of special listening training, which is very slow for the primary level; Or take a primary listening class; Or Friends, a comedy TV series, is very suitable for learning some authentic American idioms while watching.

I am an English major myself. I suggest you read and write while listening, and read more English newspapers, such as China Daily, 2 1st century. It may be a bit difficult, but you can learn a lot by choosing simple and interesting things. I hope I can help you.