Use the hotkeys. They are pretty straight forward in this game compared to games like Company of Heroes were they're all over the place. Money is your first priority so make sure you build enough refinaries. Expand all the time, always build new outposts to get money and to take control of the map. Whatever unit your opponent is building you have to build a unit that can counter it. In time you'll learn what units are good agasint what. And watch your replays to figure out where you went wrong if you lost. Or watch some expert replays @
www.gamereplays.org thats the best place for rts gamers to get tips and strats.
good luck and if you wanna game add me on xfire. I'm not a noob but I'm not an expert, somwhere in between.