Firstly, don't mention the APC syllabus around the OTC....
Mod 1- Basic training, Civvy to Soldier
Mod 2- Soldier to Theory Officer, Orders and Estimate
Mod 3- Theory Officer to Field Officer, Battle Camp
Mod 4- AR Commissioning Course at RMAS, 3 or 8 weeks
Mod 5- Add on to Mod 5 dealing with Officer Admin
Mod 1 is first year, Mod 2 is second year. People then tend to only progress further if they have passed or are going through the AOSB process.
Whilst technically all UOTCs come under The Sandhurst Group the training varies massively between units. Which one are you looking at joining?