The only Caron yarn I can think of that I would never recommend for a beginner is Simply Soft. It is harder to work with IME, will split more easily and frays quickly. Because it is so soft is is just harder to work with. Other than that, watch the videos and try different cast ons. If you can explain a bit more about your trouble in doing the knit stitches we might have some insights. Hang in there! Finally seeing those stitches is like magic and you'll have many hours of enjoyable knitting to look forward to.
Denial, anger, bargaining, depression, acceptance...the five stages of frogging.