He looks gorgeous! Welcome! Don't worry about him being big, my show girl Nancy was 180g and bigger then one hand when I got her at 10weeks
What cage have you ordered? I know hamsters can really like climbing, some prefer running. I suggest a nice big wheel
looks lol you will need a seniour wodent wheel or the big 39m karlie
we can throw links at you if you like
sounds like you are doing the right thing getting a new big cage, I hate it when they sell you something really unsuitable!