Hey Paradox. I was shocked too when I went from Amateur to Pro. You have earned 150 credits for moving up. There is a cheap WGT driver in the Pro shop that will give you ten extra yards or so. This game is very enjoyable, and I would highly recommend spending just 30 bucks or so (if you are going to continue to play) for a club upgrade. It makes a big difference and gives you a little hope. If not, many guys shoot great with the basic stuff. I'm just not that skilled to use the default clubs and do any good.
Have fun.