Realistically how hard to pass first stages

I found the theory dead easy and the module 2 more difficult. Still passed both first time.
drivingtheory4all.co.uk has a Mod 2 case studies section. I would recommend it. Learn or at least read through every topic. It’s the weird stuff that you think they won’t ask that came up for me (O licences and paperwork for going abroad etc especially). If you learn it all, you will definitely pass but there’s quite a lot to learn.

I think the passrate for Mod 2 is about 46%, most people fail first time due to lack of preparation