Doing AS and A2 may be quite a big ask! The content is not necessarily hard, in that it all makes sense and quite a lot can be deducted from general knowledge and common sense.
The workload is quite heavy, and especially if you want a very good mark, your knowledge of the content (especially the compulsory case studies) has to be sound - statistics and specific detail seem to be what get you the very high marks.
I would recommend it though. I'm taking the AS exams next month, so I can only speak for the first year! It's interesting but hard work.