Its very hard to find a regime on your own let alone with stuff as tricky to learn/memorise. I was really struggling to work and fit it in until I saw the light and had an horendous crash on my Mountain Bike. Apart from multiple facial fractures, severe concussion, amnesia and a couple of weeks on a head injuries ward I have never done so much study!!!
Now I am not suggesting that you try this at home but certain sacrifices to create time are a must.
Funny thing is that I have lost my class 1 for a while but am finally getting through this and have now taken a part time job for much less dosh so as to have a more valuable commodity-time!
I think they hit you with that General Nav nightmare to start with so as you know what you are up against
