Meh, I hate the idea of individual devs signing up for clouds like AWS, GCP, or Azure. These are huge cost machines and are designed to serve fast moving startups and hulking enterprises. The best you can do is setup account limits and alerts.

The real answer is that if you have an understanding of networks and systems, then the cloud is just a data center with different considerations. Your company should be giving you resources like sandbox accounts that you can play in. This is how you'll really learn.