The combination of FPS/RTS gameplay and teamwork make for a unique experience. It is also a challenging and deep.
For the new player there will probably be many frustrating hours spent repeatedly dying and trying to figure out things that should've been explained by the game itself. However, I implore you not to lose your patience and instead ask the very helpful community whatever questions you have. Once you experience the exhilaration of your first proper game where your contributions were a deciding factor to victory and where your team communicated and worked together to bring it all about you will understand why many die-hard fans want this to be rated Game Of The Year.