"Chain migration" is how many people
myself included
get jobs.
I went to a very good school, and while I like to think the quality of education is what makes a school "good," let's be honest
the value is largely in your connections. Friend lands a good job, recommends you when there's an opening, and bam, you're already at the top of the pile of the CVs (better yet, they're the hiring manager).
Friends from school
peers and mentors alike
are a great place to start, if you can. Ask to grab a coffee and chat about their career, and be clear that you're in the market. Most people are happy to chat (at the very least, it's flattering).
It's the way the world works...