I'm assuming you're going with the distance learning option?
It was a struggle for me and most I spoke to. Learning from home requires a lot of motivation and self discipline but it is entirely doable. Like yourself I'm not particularly academic and having left school ten years previously it was tough to get back into that learning mentality.
You have to just keep plugging away at it. Some of it will make no sense and at times you'll feel frustrated with yourself but it will all click one day if you put in the effort.
Make sure you actually study the material and not just the question banks. The QBs are great to supplement your theoretical training and get you used to the style of questioning but you still need to learn and understand the theory behind it.
As I said, I'm no genius and I came away with a 90% average so it's entirely doable. Provided you put in the effort.
Good luck!