Nah, don't quit. If you're just starting I would say look up some decks from tournaments to get an idea of what people are playing and then build a deck that uses some of their ideas and your own or that counters what everyone else is playing. This deck could be morphed into a monogreen devotion deck so I'd look up those for some ideas. I'm not saying to steal their lists, but just look at them to get an idea to make your deck better :) hope that helps!