Do I go meet my boss?

Ok so I started working this office job Tuesday last week. I was supposed to meet with my boss but he had out-of-work meetings the entire week.

He’s here today. Do I go to his office to talk to him? Or do I wait until he comes to me or calls me? Would it be weird if I go? Do I send him a message first?

I know i’m overthinking this, but I don’t know what the proper thing to do is, and i’m kinda nervous. I haven’t been doing anything work-related so far and i’m really bored too, so I want to start asap.