This sounds great to me. I'm look for a sit-inside 12' recreational kayak for my purposes, which are mainly to be on the water, to see as much of Cork waterways as are accessible, and to get exercise. I'm teaching every day at UCC from 4:00 to 6:00, and on every Tues and Thurs I have an evening event from 7:00 to 10:00.
Where are you located in relation to the city center? I'm on foot for most part, staying at Victoria Lodge on Western Road, right on the river, but I'm not sure how accessible the river is at this section.