I'm quite new to crochet although knitted a bit years ago. I'm in the mood to do a blanket and have seen a lovely pattern. It advises acrylic DK yarn but I'm not a fan of pure acrylic. Do you think I could use cotton or a cotton/acrylic mix? Other yarns would make it prohibitively expensive! If I use a cotton yarn is there anything I should be wary of eg tension? Thanks in advance!