Well, datnovice, you came to a very bias site to ask if the datsun is a good choice as a first car!!!
I drove a 1964 mini-cooper as my first car. It was a love-hate relationship. I still have it-parked at home. It gave me tooo many beans to carry on driving it, but I love it too much to sell it.
All old cars will give you problems! The number of problems it gives you depends on the condition it's in. I live in Zimbabwe & new parts are difficult or expensive to come by. In Aussie though, I dont think you'll have that problem.
Good thing about an old car though...if it does give you problems, it's simple enough to fix. When I started driving my mini, I knew NOTHING about mechanics (I'm an IT consultant). But when I watched a mechanic working on my mini, I thought to myself - all I need is a manual & I can do all of this myself!
Now I own a Datsun 1200 (from about six months ago) & when I got it, it was barely running... but its my daily driver and needs alota work, but I know that I can do it my self at the end of the day.
The Datsun will most probably get you hooked on mechanics, upgrading, modifying and pimping your ride... It's the best place to start, and too difficult either! If you buy a more modern car, there's more that can go wrong with it...
A Datsun is simple, reliable and most of all, FUN!