I don’t think this is a nesting issue. The h2, comment, and p are all nested within main. The issue here is that these elements are indented too far. They were only supposed to be pushed to the right two more spaces but they have been pushed to the right a lot more than that.
I would restart the step to get the original formatting back. Then, the only thing you want to do is use the space bar on your keyboard to add only two more spaces before the h2, comment, and p. That’s it, don’t make any other changes.