Most pre-skeined yarn is center pull. You just have to find the center. If you're using a hank, then you have to roll it up or you'll get terrible tangles.
I agree not to cut it. It will be a big ball, but why have to join a new end unless you have to.
I agree about the needle size, too. For things that don't have to fit, you can get away with it--it will just be bigger. What is it you want to make?
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry