No matter how you want to get around Portland, there are many good ways to do it. Public transit includes the usual buses, plus the excellent MAX light rail system, and well as a fleet of modern streetcars. You can walk or bike around downtown, and of course there is always driving. The MAX light rail line goes right by the convention hotel and directly serves the airport.
Rather than duplicating the information here, the best place to get details of the transit system, roads, any construction or closures, and of course maps, is the Travel Portland web site.
To give you a feel for where things are located in Portland, here are a few aerial views of the city with landmarks marked.
These overviews show where the Convention Hotel is in relation to other landmarks in Portland.