You apply for a job on the website. Or actually (even better) you know someone. First step is being contacted by a recruiter. You'll have an interview with that person. If they are still interested, you have a in-person meeting with the person who is hiring and members of the team. You might have more than one rounds of this. When they still like you ... you'll get the job.

There is a standard list of Behavioral Interview questions. All are "Tell me about a time..." and you must respond with the STAR method -- Situation, Task, Action, Resolution. In that order. Its very simple, just come up with a few anecdotes. Some of the interviewers may follow up with some actual questions, but you essentially just need to prepare with some interesting narratives.