Best Way to Commute to Downtown Van.

Hi there! I will (likely) be living in Aldergrove for 8 months, and commuting into Van for work (about a block away from waterfront station).

The best route I have found so far is taking bus 503 to Surrey central, then the expo line to downtown.

The 503 though takes about an hour to get to Surrey central. Does anyone know if there is a faster way to get downtown (other than driving, as I have a disability that impacts my ability to drive).