The wolf is a great disc for new players as it forgives you errors. However, I wouldn't recommend it if you are trying to improve your game. Then you should throw something that won't forgive anything. From Innova I would recommend a Roc or a Roc3. You could also try a Buzz, and maybe a Comet for something bordering to understable. Maybe a Mako3? Shark? You don't need many discs when you've just started playing.
For the Buzz and Comet, go for a plastic that can take a beating. Then the discs will behave the same way all the time, and you won't get tricked when the flight path changes. I made that mistake myself, and it took me a few months to realise what I did wrong. Hit the field and practice. It's the number of throws that matters, not the number of holes you play.