I live in Asia and the lower end dim sum restaurants here use minced chicken or pork instead of seafood. Two important ingredients to add to the minced meat filling is chopped water chestnut for the crunch and sesame oil for the aroma.
I just posted this on another thread but maybe it is more appropriate here.
Not really authentic Japanese but consider making California hand rolls or temaki. The ingredients are all pretty easy to prepare. The hardest item is probably the sushi rice itself. All other items are just simply...