Arriving in Venice

Very chaotic and confusing to us. Do we take the bus then the vaporetti or take the water taxi then the vaporetti? Price was cheaper to take the bus then the vaporetti (3 Euros for the bus per person, plus 6,50 for the vaporetti per person vs. 20 Euros for the water taxi per person plus the vaporetti tickets). Plus the bus was air conditioned, the water taxis are like sweat shops (and they may limit your luggage).