The typical class breakdown is like this;
6ish months in classroom, learning general fundamentals followed by systems. General fundamentals includes things like reactor physics/theory, thermodynamics, and equipment like pumps/valves/tanks. Systems is detailed training on your plants systems. You will have exams roughly weekly during this time, with milestone exams after each phase (general fundamentals and systems). During the systems phase, you may get to go to the simulator a bit to touch the systems you are studying. Also, there may be money tied to your milestone exams in the form of bonuses. Of course, to continue in the program, you have to pass the milestone exams. As for schedule, at my plant, the classroom phase was straight days. Some work another shift to use the simulator, but its all a straight shift, not rotating.
After your systems phase, you then start simulator training and on the job training. You have to have roughly 520 hours on shift in order to get a license. So you time is split between simulator training and actually being on shift with crew. Now, for us, we made our own shift schedule. As long as at the end we had our 520 hours, they didn't care how we got it. So, I was with a different crew every time. This was good because I got to spend time with each of them, and got many different perspectives on things. While in OJT, you will have some sort of qual book with sigs to get, you are no stranger to this. You are also required to get 5 reactivity manipulations on a real reactor for the NRC. This phase last roughly 9 months. In the simulator, they will start you out slow with T ball league scenarios, building until you are able to pass a big league NRC exam. During this phase, you will be examined periodically to ensure you are still studying and learning as you go. You will also have a "certification" exam a few weeks before the actual NRC exam. This is an NRC level exam to week out the non hackers. If you don't pass the cert, the station will not allow you to take the NRC exam.
And in case you are curious, an NRC exam consists of a 100 question multiple choice written exam, 15 job performance measures (JPMs) which consist of admin tasks and operating tasks (ie putting systems into and out of service), and of course the simulator performance exam. As an SRO, you will be examined as a control room supervisor and one of the RO positions, at a minimum. If you would like to see what the general fundamentals exam, and the NRC final exam look like, you can find past exams on the NRC website. Do not be fooled into thinking that just because it is a multiple choice exam, that it is easy. Its not.
I hope this helps!
Good luck and let me know if you need help finding things on the NRC website, it can be hard to navigate.