What Advice Would You Give to a Protestant or Evangelical?

People are attracted to the roman catholic church through its mass, because of its is asthetically pleasing. We usually don't have anything quite like that in our evangelical churches. What advice would you give to some one who may identify as a protestant or evangelical? Read some things from leonardo, some things from me and others to understand what's actually itm in the mass before you start adhering to it and taking it in.