Hello there!
History can be hard... it was especially for me. I am terrible at remembering dates and names. A life saver for me was creating flash cards to help me study. This may help you as well.
I found this page especially helpful: Penn Foster Student Resource Page. I found this page by selecting the "Interactive Course Resources" button underneath the "Resources" section in the American History course box. There is a breakdown of every lesson and assignment with a educational video.
I hope that this can help you as much as it has helped me. Best of luck!