If you are unsure which license best suits your needs, there are plenty of resources to help rights holders choose the right CC license. CC Australia has developed a flow chart that may be useful in helping you settle on the right license for your work. You can also read case studies of others who are using CC licenses. The CC community can also respond to questions, and may have already addressed issues you raise. The CC community email discussion lists and discussion archives may be useful resources.
Finally, you may also want to consult with a lawyer to obtain advice on the best license for your needs.