CRM is exactly as described by Scroggs. However, for your ATPL exams you will study HPL (Human Performance and Limitations) which really deal with the individual (physiology, health, information processing, basic psychology etc.) to prepare you for the inevitable errors occurring due to human limitations.
Any airline you go to will likely have a CRM course, dealing with effective interaction and communication with everyone else involved in a successful trip. that includes you, your fellow flight crew members, cabind staff, ATC, maintenance staff, dispatch - the list goes on.
The bridge between is the MCC (Multi-Crew Co-operation or Co-ordination), invented by JAA to make more cash (ok - that's my one and only sarcastic dig). MCC deals with (or should deal with) the flight deck relationship between two people, since most modern airliners have a 2-man flight deck crew.
So don't dive in too deeply to CRM at this stage - that will come later. Concentrate on the bits you need at each stage and, assuming you are the "right material", you will absorb the rest and hopefully put it to good use as you progress.