Agree with Hempy, I've been around a bit longer (40 years) but non op now and AIP was/is a constant reference. Although some say it only helps for the first two months, if you are already familiar, it's a much easier two months. It is great to cross reference AIP with MATS and see how similar information is published in each. Doing that makes it easier to see how aircrews relate to ATC. When you get into the field, you will be referred to AIP during AIRAC amendment cycles. Operation controllers are required to remain familiar with AIP. If you have quiet time during a shift, flick through all types of documents. It's amazing how often you'll find something new of get a slightly different view of things. All the best for the course.