There is quite a lot on utube as far as videos and practice routines/drills to improve your game. That is about all I know as here in the US there is not a lot of interest in playing snooker unfortunately.
Lots of material from one of the former coaches of Ronnie O'Sullivan...how bad it could be? It is probably useful even if you only play pool. If I had the money and time I'd book a private session.