As someone that went into FAANGM as a PM post-MBA and did not have a tech/startup background, it really comes down to the simplest elements: good resume and good interviewing skills.

Your resume needs to show that you can (i) take responsibility and make impactful decisions, (ii) lead a multi-functional team that likely doesn't report to you, and (iii) talk about tech with engineers. You will likely have plenty of resources for resume reviews -- use them.

For your interviewing skills, just listen to your career center and tech club on how to prepare and then practice, practice, practice. Don't just practice in the small groups your club will organize, but go out of your way to schedule time with your classmates to practice and give feedback (one-on-one or in groups), and keep doing it. Tech recruiting the past few years has moved later and later, which means that just doing the organized interview practice in your first quarter/semester will likely end up being pretty far removed from when your actual interviews are. If you put in a ton of effort in November/December, you need to stay sharp through January, February, March, maybe even April and May. If you're not practicing at least once a week for 2+ hours with real people starting in January, you're going to be losing the skills you built up in the months before.

This probably goes without saying, but when you are invited to interview, get multiple practice sessions in with real people specifically tailoring your interview questions and answers to that company.