Hello and welcome to BW
Congratulations on your wee baby boy! 7 weeks is very tiny still but it is around the time when babies start to wake up to the world a bit more, and get a bit hyped up by all the amazing things going on around them. He will learn to resettle and sleep for longer, and you can definitely help him to do that.
To help him learn to sleep better during the day, you can start gently helping him get into a routine. At his age, we'd expect an A (activity time) of around 1 hr 15 mins perhaps, that's from eyes open to eyes shut. After he's been up for about an hour, you might want to start watching him to see if he needs to sleep yet, and if you think he does, you can encourage him to take a nap, using the approach outlined below.
I don't know if you've read any of the BW books, or had an opportunity to read around the site but these links should assist:
Starting EASY - all you need to know and more!What does a good wind down consist of (Includes 4S ritual)Come back with more questions!