It depends on what type of cake your making....the list of answers on this could go on and on and on. If you have an idea of what type of cake you want or how you want it to look feel free to funmail and i can explain some easy steps to you.
so many ways on youtube...they show you step by step...how to begin from scratch or simply how to make icing/frosting/creams/toppings....even decorations...I was just showing that to my mom for her cupcakes! :P
go to foodnetwork . com (no spaces) and they'll have tons of thingson there. practice makes perfect.
U shud ask manydyloo bout that