ppl do classroom work am then practical pm or some times its a full day of one or the other but you will not have weeks in the classroom without doing the practical, the stuf you learn in the class room you then do in the workshop. this lets you understand the process quicker, they have 3 to 4 guys in the workshop so your in a small group if you pick things up quick then you have more time to practice if you are not sure you will get more help. once you have built up your confidence and speed if your work is goodenough then there are things that are not on the C&G course that you can have a go at like plumbing electric showers, power flushing radiator systems
there are always some old jokes to lighten the mood
good luck
uug