Only one place for you to start, www.detailingworld.co.uk
I would say get a DA polisher in a kit from places like cleanmycar.co.uk, do your research first and don't jump straight in. I've used chemical guys hex logic pads and Menz polish to great affect.
Also don't forget the two bucket method, clay, micro fibres etc etc
I'd say you need to spend a minimum of £200-300 for a decent load of detailing kit.