Start with the electrics and hydraulics, as almost all other systems are touched by those two. Knowing those two will help a lot in finding logic in other elements of the aircraft.
If You want to understand the technical side, get Yourself a colleague from Your class. Sit down somewhere quiet, get a glass of whatever oils Your throat, then pick a subject and discuss it. What does it do, why does it do it, what will it need to do what it does, what other systems does it feed or support, in what ways can it fail, and in what ways can it turn against You? If You disagree about something or are not sure, out come the books, and if there is no help in those, take a trip to Your instructor and have him respond.
For procedures - chair flying. Sit in front of a cockpit picture and think those procedures through. There are some official memory items and two unofficial ones: an engine failure in cruise and a rejected takeoff both require actions by memory, but they are not listed in OM-B - PRO - ABN - ABN/MEM - Memory Items unlike the others. Your company may require callouts to the cabin or ATC to accompagny those.
In a nutshell, do not learn questions by heart. Try to get an understanding of the aircraft and its procedures, this will help You immensely in the long run.