“Get into” is actually a C1 level phrasal, but you can still use it to get higher marks in your Cambridge B2 First exam. It means to become interested or involved in something and is closely related to the phrasal verb “be into”.
…There are many different ways that teachers can encourage the children to get into science…
Examiner: “What do you think is the best way for someone to get involved in property development?”
Candidate: “Well, I think that anyone who wants to get into property development needs to first learn the basics…”