Responsive mobile display padding

almost of the the child themes on the Responsive Coupon them have padding issues on smaller phones 320 X 480. how can I fix mine, I am not very good with html and css but have a little common sense it took me an entire day, and then searching thru this forum to find out I needed to click “save” a few times in the permalinks section to solve the problem where my stores contents were not showing, these minior time consuming issues are really frustrating when the fix is just a second away…. knowledge is power. there should be some sort of compilation of known, easily fixable issues that can save people a lot of time. watching older videos of a and different new system is confusing to me and although you should have no, problem in business, hiring a professional, some of us are just not able to. so thanks in advance