Hello and welcome to the forums
Enzo is a beautiful boy, I think the name suits him very well
I would say he's about 5-6 months old because he's had his first moult by the look of his cere and head barring but his irises still aren't fully visible.
To make him feel at home, you can play soft music, as silence means danger to budgies. Also, you can cover his cage on three sides. Don't try to touch him for the first week or two, just get to know him. You can sit by his cage and talk, sing or read to him. After that, you can start to get him used to your hand by slowly introducing it to him.
Also, I would suggest getting maybe a few bell toys or singe budgies love those! I see you do have some natural perches in your cage, that's good, as dowel perches of all the same size can cause foot problems.
It's great to meet him, as well as you, and it's wonderful to have you on the forums. Please do ask about any questions you may have as we'd be more than happy to help!