Yes, commercial is a good way to start out if you are new and unfamiliar to the game, but i`ll tell you right now that going tax by putting all infrastructure on housing and increasing loyalty to the max to like 5000 (and researching nothing but housing) or making nothing but food (and selling it on the market) and having just enough housing to support yourself tends to be more profitable in the long run.
So again, go with commercial for now cuz you are new, but once you get the hang of the game, you`ll want to experiment with these other 2 income paths and see how you like it. Be sure to get the help of an experianced player when you decide to experiment with terran taxation.