The boat we arrived in only stopped near San Marco and then near the train station. The city water bus and the Hop-on Hop-off tour water buses leave from near the Basilica San Marco. You can buy tickets to go over to the Academia. Water taxis can also take you but at a much higher rate but go directly. Several options once you get to Piazza San Marco.

Hi Winston, Ca dei Conti hotel ( looks like a super choice ) is in the middle of the island. I'm guessing the Boat Transfer guy will drop you at Riva degli Schiavoni - the wharf just before San Marco. They don't go up the small canals. To avoid San Marco square ( busy & v crowded ) aim for Campo San Zaccaria probably the easiest route & head inland. The most notable landmark very close to your hotel is MUSEO QUERINI STAMPALIA. Your Venice map will show the Campos (squares ) so go from one to another ... & ask directions if necessary. You will pass plenty of cafes & bars so take a breather. You've got a 400-500 m walk & they are stone lanes so trundling wheelie bags is a bit of a challenge... & then there are the bridges/pontes to get over... & the crowds. You will forget all the negatives of moving around Venice so just enjoy this magical place. Once settled in, walk to Rialto Bridge & get a Vaporetto down the Grand Canal to San Marco as that gives you some idea of the layout. At San Marco go up in the lift of the Campanile for an aerial like view & all of Venice is spread out before you. You will enjoy.