I was tempted but had an AWS runaway 5-figure bill at work once - I think someone forgot to shut down an EC2 instance - which has scared me from using them for

I was tempted but had an AWS runaway 5-figure bill at work once - I think someone forgot to shut down an EC2 instance - which has scared me from using them for personal projects. I heard they're usually understanding in those situations and have features to limit your bill, but that feels like overkill for personal email.