You're not coming into the best time of the year to learn it, but you need to find the areas with little to no current. I don't know the area well, but there are several places like that in the Dubuque area. sunfish lake, mud lake, there's also a little area across the river but below the dam by the barge (I can't think of the name), on the Dubuque side below the dam there's the marina. On a good cold winter with little flow I have fished right below the dam (I think the 1000 foot marker). Then you have bussy not far to the north.