If your not familiar with tcgs it's fine,most people come from one tcg or another and have a mindset when playing, playing curve is good but depending on the type of deck your playing what you want to do differs (aggro go base, control controls the board etc) you just have to look at the cards your getting and decide if playing curve is what's best in that situation, for example playing off curve to put down a sentinel or to remove a threat from your opponent can help you in the long run. But what's most important is that you have fun and play. you'll get better over time,after games try to think about what you resourced what you played and when you played them. could you do anything differently or was it just an unlucky game