Cluster feeding?

My 6 day old and I have had some latching issues, but overall we’re making it work. He usually eats for 15-20 or 25 minutes every 2-3 hours. First question: is 15-20 a good amount of time? I see a lot of people posting their babies are going for 30 minutes or more.

Second question: just this morning instead of eating for a good amount of time every 2-3 hours he’s doing more like 5-7 minutes every hour and then totally passes out and I can’t get him to wake up and latch again. Is this cluster feeding?

Thanks in advance!