how to remember
There are many ways. You can write the words down. You can listen to the audio several times, even over ten times until it becomes like a song, an earworm, that you will start hearing often. As long as you do something every day for a long time, learn from the techniques and mindset of experienced language learner, (and don’t give up) you will get fluent eventually, if you really want to.
Just don’t worry about forgetting; that’s part of the course.