New Owner

[MissT]

Hi guys! Not really sure how this forum works or if I am doing this correctly. I got my new hamster Rodger from pets at home yesterday- he is my first since I was around 12. I didn't know what I was doing as a child, and now as an adult I want to do this right. He has been in his bedding today and it keeps shaking? Is he okay? I am wondering if he is cleaning himself but its happened a few times and its been daylight.. I know they are nocturnal. Just getting worried he is stressed. I can see he doesn't have enough saw dust to burrow in but I don't want to wake him to provide more. He hasn't gone is his hut yet either. What shall I do? Please let me know if you can help!