Why should LIDO GEN stuff be difficult? Yes there is a vast amout of info, majority of which is 'by reference', but how is it any different to JEPP GEN everyone was using in their previous life? Its exactly the same content; squak 7600 when you can't speak anymore, 2 red/2 whites will always look pretty etc!
What differs is FCOM and OMA, 2-3 months to have an above average working knowledge by the time you come up for your RLC, is a small requirement in just about any airline.