If you are new to the game - Please enter this referal code after completing tutorial: nlc20675
You will get a new Rare card and 100K
Regarding game play:
I have found it helpful to use the "Quest area list" to re-select the basic quest. This will only cost you (1) stamina point and allow you to gain a massive amount of cards - then "evolve" them to the highest form for enhancements.