Good job! Next time write out everything you did and the weights you used. You'll need to keep track of that to make sure you're progressing, and it's fun going back and looking at old workouts and seeing how far you've come.
You probably will never feel that hungry after training. It's normal, so don't worry about it. You still need to eat though. After a while you'll get used to it. I can eat just about anything after training with no problems, even though I'm not necesarily hungry. I've just been doing it for years.
You're a skinny fella! Why are you worried about overeating? If you don't feel like eating your sweet potatoes and fish every now and then, just go get a big mac or a pizza! Oh, to be young again.
Current PRs at 242- 495, 345, 585, 1425