Navigate through the posts to machine learning 101. It's a free video from YT. Watch the video and take notes. Did you write down the machine learning hierarchy? Can you define machine learning? Can you define AI? What is a machine learning model? What makes a machine learning model a deep learning model? Ok, you get the idea. There's probably 2-3 pages of notes from this video alone. Technical interviews are brutal. You either know what you're talking about or you don't. Be sure to download the note taking strategy I recommend, (blog post also) and then take notes on all the videos in this series.