You went to uni, right? They should have a careers service that can help you out with this sort of stuff.
In a lot of ways, you’re right. People with this kind of institutional knowledge are at an advantage, but you have to try and find out as much as you can from others too. That’s difficult when you’d be happy just doing a job that earns money, but have a think about what sort of broad field you’d really be interested in and go from there.