I want to try to make a sculpted cake, but have no idea where to start. I'm hoping some experienced users can answer my questions. 

1. What should I do for my first sculpture? What would be easy for a beginner?

2. What kind of cake should I make? I've heard that pound cake is supposed to be good.

3. Is there any special tools that I will need? (I have decorating basics, but is there anything that I will need to sculpt (like a special knife)?

4. How to I assemble sculpted cakes? I've recently learned how to assemble tiered cakes with dowel rods. Is there a certain way I should do it for sculpted cakes?

Please feel free to add any additional sculpting tips/decorating sculpted cake tips!

Thank you :)