Stuck on lesson 4 of Learn HTML by building a Cat Photo App

Hi to all, I just started the new responsive web design course and I’m stuck on the fourth lesson. I don’t really understand the task, it might be that my English is not that good and I’m not getting the point of it.

I started a couple of months ago the old course and it was so much better with all the hints and help in video, this one just repeats that my “‘h2’ element should be below the ‘main’ element’s opening tag and its opening tag should start 6 spaces over from the start of the line” and I don’t understand what it means.

Please post your code and a link to the challenge. Thanks