I very much second this. I remember I had so much trouble landing my first internship that I was near the point of dropping out my CS degree to switch major. A

I very much second this. I remember I had so much trouble landing my first internship that I was near the point of dropping out my CS degree to switch major. After a few internships and also landing full time positions, I realize interviewing is really a distinct skill that's apart from your ability to perform on the job. Especially with companies that make you do coding puzzles, you have to treat it as a standardized test and put some effort into studying for it. With more interview iterations, you'll also become better at presenting yourself and showing confidence (which I believe will have a major impact on people's first impression on you).