Acknowledging the reality of history and business here that there's a 99% chance you don't exist in a few years, I would encourage you nonetheless to break EC2 and AWS in every single way you can possibly imagine and in ways you can't, obviously not in your customer account, but in a separate one. I was doing consulting services for a machine learning company that sold pre-configured EC2s and associated data infra to third-party researchers at a markup and basically stood up and ran their whole environment for about two years. Networking is probably the most frustrating thing you'll ever encounter and beware when they change their APIs and parameters that used to default to null no longer do. It's especially fun when the Linux kernel on the hypervisors you can't see messes with your packets.