The career earnings are the total of all the prizes won in various tournaments, for example I have won 2 different trips with WGT (arp $2400 each) the rest of my total are various gift cards and WGT credit wins. The only thing that comes close to 'real' cash are the gift cards.
There are quite a few free and some paid tournaments that you can enter to start earning prizes, but the competition up here in the Master tier is pretty steep, so make sure you're up to the challenge first. Practice Practice Practice!
Eagles will come in time, I have quite a few, but I play a lot. It was only near the beginning of this month that I got my first (real) hole in one, I was getting impatient too... Relax, it will come when you least expect it.
Oh, and remember, it is just a game so most important tip......... HAVE FUN!
Lee