As spells / statuses all can be placed on a creature in the same way it can take some learning time.
General rules of thumb:
Losing a creature before you cast their spell is bad.
Using a spell or enchantment to clear a negative effect is great.
Steel and silence are very powerful but can be confusing in execution.
I recommend playing a Strength based deck so, while you are learning, you can reliably have good sized creatures to win fights :P