You're intending to study nursing? Right, so that is a professional course, not just any regular degree. As such, it's important to begin developing your study skills and mindset now so that you take full advantage of the next 12 months to prepare you for the demand of full time study.
My advice with Access is to approach the course as if you are working your way through your first semester at Uni. Pretend you are already on the course, read carefully around the topic in question and really go hammer and tongs at each piece of work to bring it to a level you'd be happy submitting at University. Of course one can read textbooks or use youtube videos to grasp concepts but you need to seek out proper sources of literature and reference each piece of work nicely as well as presenting it correctly.
Get into the groove of this now and you'll be well ahead of the game when you reach Uni. Couple that with the advantage mature students already have and you'll be flying.
Best of luck.