What a cute little guy!! I know 6 wks is early, but dontcha just LOVE how adorable he is!!
We got Bella when she was 8, almost 9, weeks, and even though it is so HARD when they're that little (sooo long until they're potty trained, have to watch them like a HAWK, etc...) there is nothing better in the world, and I'd do it all over again if I could!
He doesn't look like he's a teeny one, though, so that's probably even easier! (Bella was 2 lbs. when we got her at nearly 9 wks, and she's ~4.5 lbs now as an adult. So, not a teeny either, but I think maybe smaller than yours, no?) Good luck! He is just adorable!! Uh, oh....I'm getting puppy fever again!!