what's the simplest way to set up?

I am a total beginner to this and would love some feedback on the type of gear people are using for practice/rehearsals.
ie. Garageband with soundtrack?
ie. Garageband with soundtrack?
Answers
for just singing i was planning garageband with karaoke music file.
so, big quesiton... can i run garageband and video record it at the same time. maybe with quicktime player?