Hello!
I don't know a great deal (just got my first two snakes a couple months ago, but have had geckos for a few years now), but I'll try to be as helpful as possible.
I would leave him alone to get used to his setup for a 1-2 weeks (this is the same for most herps)..minimal handling, just do regular cage maintenance.
If he is in a large (to him) tank, provide lots of cover, branches, vines, hides, etc.
I believe babies need a more frequent feeding schedule than adults. My two, which are both very young, eat every 5-6 days. I've heard smaller, more frequent meals are better than over sized less frequent ones.
I have also read that babies can be more sensitive to humidity / temp swings than adults, so just watch your temps like a hawk.
Once the quarantine / adjustment period is over, I'd start with frequent, but short (like 5 mins. every 2-3 days) handling sessions. Then you can step it up as he /she gets used to you.
Good luck!
Artgecko
p.s. great pics btw!