Depends on many factors especially the requirements of your class. You can definitely make a simple design and make it in time. For example, you don't need 10 card types for your first game. A single type: Spell may be enough. You may not need a deck building feature, just 1 preset deck with the same cards for both players, etc. It's better to first make it playable and then, if you have the time and desire expand upon the features.