Originally Posted by
Gondorian
It should help a lot because you can sell the contents for about 8000 gold.
If you're still stuck, we give a free card every day in the Daily Chest and swapping the hero in your current deck for another of the same faction and class (e.g. Boris for Amber) will open up another campaign. Multiplayer pairs by rating so you should end up against people you can beat eventually and you will get ideas and varied experiences. You might even meet some nice people who will give more advice (ask on the Global Chat).
The best route to quicker progress, of course, is spending some money, which is much appreciated because it funds future development. :)
Good luck!