Hey, you know what? Every single one of us on this site was a newbie at one time or another. It's nothing to apologize for.
Those stress marks can also be on a baby that's kept a bit different temp than what he prefers. You may want to try messing with his temps a few degrees this way, a few degrees that way, just as long as you're within "the range".
If you still think it's stress, it could be something as simple as him being housed in a busy room, such as the living room. You can try limiting what he sees by covering the glass with paper or putting him in a different room.
Babies are so difficult sometimes, but once you figure them out, it's all just fine. Just remember...what works for other dragons may not work for your guy. So make sure to try different things, and you will eventually find what it is he likes.