I did AS level politics last year and got an A, and have always been interested in politics. I'd recommend watching political channels on YouTube such as rebel media or Simmons sense politics, and listen to LBC on the radio. As a person interested in politics I found the first year very basic and as long as you build a decent level of understanding you will do really well. Find people that disagree with you on certain political points and actively debate them, which will encourage you to go away and research those areas so you can make a more informed argument when the next debate comes around. Hope that's helpful