This video shows you how to knit in the round using circular needs. It isn't hard but you need to pay attention to where the next row begins and ensure you keep the tension even at that point. It takes practice . This video will help you because it shows you how to make something small which you will manage more easily. You can then progress to bigger things like beanies. The other advantage of flexible double ended needles is you can more comfortable knit a lot or stitches for things like shawls or you can use then to put cuffs and collars on garments.