Congratulations! I hope you enjoy each other to the fullest!
I've got my dogs on Canidae All Life Stages. It's a higher end food, and all of my dogs love it. Their coats are beautiful, their energy levels are up, and I can feed them less of Canidae than the Pedigree they were on before, which they didn't really like.
Definitely buy some chew toys like Kongs, maybe something you can hide treats in. Better yet, if you can make treats that you put in the Kong and then freeze, your Sibe will adore you, and it will keep him busy for quite some time!
NEVER, EVER let him run off-leash! Sibes will run and keep running, then look around, realize they have no idea how to get home, and latch on to the first friendly face that says "Here, puppy", and unless you are very lucky, you have lost your dog.
I hope these tips help a bit. Good luck!