11 Weeks napping only for 30 mins

Hi,

So my 11 weeks old starting to nap only for 30 mins and awake for 1.5 maximum to 2 hrs. I tried getting him back to sleep but it's hard as he seemed very happy and bubbly wants to play. He sleep well at night though. So he will nap from 7-8,9ish meaning asleep but keep waking up every hour or 40 mins as he needs help to get back to sleep. Up from 9 he is out and asleep until 7 am but mostly waking up to 9 am and feeds in between. Just wanting to know if this is normal cause obviously in the guidelines didn't really mention if napping only 30 mins each is fine. Thanks :)