I have an 8 week old too. Oh, to get some sleep!
I babywear, so my little guy usually naps from 9-12 when I'm out and about in the morning with his sister, and then he naps in his crib for 1.5 hours in the afternoon, eats, and usually goes back to sleep for another block. It sometimes takes me two or three times to get him to sleep in his crib, but I just keep putting him down. They are unable to self-sooth at this point, and we can't really teach them to put themselves to sleep until the 12 week developmental milestone, so until then, we just have to hang in there. If you really want to get him to sleep, get a sling. My guy goes right to sleep and will continue sleeping until I wake him!
And yes, they do one long stretch and then it's every 1-2 hours at night. Totally developmentally appropriate. So much fun!
Also, their systems cannot handle rice cereal, and there is no scientific evidence that 'solids' help them sleep longer. It's a myth that can be dangerous.
What I'm doing to combat the lack of sleep: keeping myself and 2 year old busy. We are out every morning, and then, in the afternoon, while she rests, I sit down with a cup of tea and try to rejuvenate myself. I'm also trying to cherish every minute of my baby, since this will be my last. It's exhausting, but soon we will get sleep, and next thing we know, they will be off to college!