Basically it comes doen to this: If you're that new to *nix, why on earth would you want to try a distro designed for advanced specialists?
Go learn Linux first. There are a number of Live CDs you can try. When you're at least comfortable with it, then come back to BT and take a look at whether you'll ever need any on the pentest tools.
Edit: Never mind, I see this clown was just banned.