Welcome!
Something youll want to note with deck creation is to ALWAYS use 30 cards when not running time (or an extremely slow deck), Ive found that normally 12 pillars is a solid amount, especially for monos, though obviously this can be altered depending on the costs of your cards.
I whole heartedly reccomend trying to buy every unupgraded card before upgrading (though make a few solid decks first) this way you can easily test out new decks with out having to resort to the Trainer (
http://elementsthegame.com/trainer (
http://elementsthegame.com/trainer)) of course though dont feel forced to, remember that its a game, and games are meant to be enjoyed!
Anyway, eat you greens and dont sell your nymphs, happy elements!