Working with straight or circular needles doesn't affect the difficulty or ease of knitting, which depends on the level of the specific pattern or project you are working on and not on the needles used for it. It's a personal choice, and although you can definitely knit with both types of needles, their differences will probably affect your preference for one over the other when working on a specific project.
Straight or standard needles can be easier to hold for beginners because they can be positioned under the arm during knitting. These needles can only be used when knitting flat pieces and when the project is worked in rows. Their long shape and wooden material can result in heavier needles. Sometimes, it can be difficult to cast on as many stitches on straight needles because of the limited space available for the material you are working with. In addition, the weight of the materials and the needle together can cause fatigue to the inexperienced knitter.
Circular needles can be used to perform the same tasks as the straight ones, which are: knitting flat pieces and working in rows. They can also be used for patterns that are worked in the round. This is particularly handy when creating cylindrical items, such as sleeves, snoods and cowls without a seam. However, it seems important to remind you that very few of our patterns are designed to knit in the round. Some of our kits that offer circular needles are not designed to be knit in the round. Another advantage is that they can be used in Raglan patterns (garments like tops and sweaters that are knit from top to bottom, in one piece). In addition, regarding their composition, the wooden parts of the needles are shorter, resulting in lighter needles. The flexible cable, which can be rolled up, makes them convenient while storing or on the go. You are less likely to drop stitches while using these needles. The variety of cable lengths available make them suitable for many types of projects. They can also be more comfortable for knitters who prefer the continental method.