Hi, I'm sorry to hear your having a hard time with work!
i know first hand how difficult it is to find decent employment when you suffer from a condition.
If you are looking for work with lots of information have you tried entering Administration? like finance or just general office admin there tends to be heaps of data to work through, if you have no experience then an apprenticeship is a good way to start.
Hopefully the jobcentre would be able to put you into the right direction, if not they may be able to offer some course that will help give you the skills to get into the work you want, my younger brother got offered a few and said they were really helpful for him.
I hope you find work you enjoy soon!