Raider, you probably need to talk to your broker so they can get you qualified to trade options. Trading covered calls requires the least bit of expertise of all option trading, which can get somewhat complicated  

One rule of thumb - only sell covered calls on days where the stock is up! That rule should serve you in the long run. 

My own covered call activity recently in Poet has been a loser, but like you said, losing on a bit of your position while winning on the majority is still very good.  I have closed out (bought back) some of the calls I sold at a loss.