This is exactly how interwiews should look like. After submitting cv, I got a call to arrange date for the technical 90min call and that was it. The technical call was very nice with around 5/6 people. Main focus is on your projects, git commands and some classic python operations, nothing to worry about. I recommend digging into oop before. Overall, very great experience, this is how interns should be interviewed, short and well strucured process, no such thing as 6 stages of interviews that are stressful and extremly hard.