Well done on passing
For reference I did a 4 day DAS course:
Day 1 - CBT
Day 2 - 125s on the road
Day 3 - Big bike
Day 4 - Morning of big bikes and an afternoon test
I came from zero experience, all I had was my theory certificate from the week before, ink still wet
Our days were from about 10:00 to 15:00+, considering that I had never ridden a bike before, it was pretty easy to get going by about mid-day on day one, on day two I was still buzzing and loving every minute and mile, then came the big bikes - never again will my arse touch the seat of a 125; they have absolutely nothing going for them over a ‘big bike’ (apart from fuel economy!).
Now that the new test is in force though, a 5-dayer is probably enough I guess, it really depends on how you get on really, a mate of mine at work is looking at doing his test and mentioned that some schools offer a ‘free’ hour or so session on a bike to see if you like it; if you then decide to take a CBT you get a discount… may be worth enquiring about if you’re uncertain.
Best of luck!