I suggest to add a Course for the Hacking - Counter/Hacking. Example me; I don't know so much about computing. Adding that will improve the use of the Hacking.
Well, I think the only trouble will be for people who don't know English well. Children who play CIT will benefit most as they'll be learning things they probably don't know. Also your mind remembers things better at a younger age so it might not be that hard for them to pass the simple exams.Though there will certainly be progressive exams, notice how the exam is called "First Aid Level 1" which confirms that we intend to have a Level 2, etc. Some exams can be very hard like 50 questions and passing those would be a huge achievement for you and you will benefit well ingame too.
Can't you just google these things? Hacking other people is bad. Hacking and computing are different. + Maybe you should how to prevent DDoS or counter it.