Knitting into held stiches

Hi. This is my first post, I was hoping you could help me out; I am knitting a shrug from Stefanie Japel’s fitted knits. (great book!) after finishing the back and shoulders I separated the sleeves.
I am almost done with the left sleeve and will have to start the right one. it tells me to put the stitches back in the needle and begin knitting, do I just just begin knitting with the unattached yarn? makes sense to me…:think:
i am confused because the first sleeve had the yarn I had been using throughout still attached.
thanks guys!

Yes. If there’s no yarn there, and there wouldn’t normally be, start knitting with new yarn and you can weave in the ends later.