It's good to hear that you analysed it yourself and worked on what happened to improve your breaking
I would say take it easy but still try to learn and improve & I think that a decent advanced riding course will help you get your confidence with your machine back up, I can't speak for the clubs that are in the UK however I know Lurch has already mentioned a few.
Do you know what it is that is stopping you from pushing yourself, is it lack of confidence with the bike itself or with your abilities since the accedent?
I used to have issue with leaning with my bike, until I got my mate who's an instructor to ride my bike, first he showed me how I ride (how far I lean over etc) then he rode it like he rides and was leaning over so much more which give me the confidence to push myself because I now know what bikes and my bike especially can do.