Based on the tweet "Three more shifts then I start the next part of my tutorship in response #enjoyingthelastfewdays #excited #nervous #newchallanges", categorize the level of joy felt by the author. Select from the following: 0: no joy can be inferred, 1: low amount of joy can be inferred, 2: moderate amount of joy can be inferred, 3: high amount of joy can be inferred.