Goes together easily and requires only 2 yards of fabric, plus a little more if you want pockets. (I added an extra pocket on the inside.) You could also easily shorten the straps if you want to use less fabric. The exterior provides a great space for embroidery, patchwork, or any embellishment you like.
Thread nests on the underside are often related to tension problems with the top thread. If you've cleaned and re-threaded (and make sure you re-thread with the needle in the UP position), you might have a mechanical problem that requires the help of an sewing machine repair person.
You can look through the pattern selections of the major pattern manufacturers - McCall's, Butterick, Simplicity - and find "easy" or "quick sew" patterns that are good for beginners. They usually include some basic tops, simple dresses, easy skirts, and maybe some bags or aprons. Another way to gain experience and still feel like you're actually accomplishing something while you learn is to make small home goods - pot holders, place mats, coasters, etc.
Above all else, HAVE FUN. If you try to take on too difficult projects before you've got a basic sewing skill set, you're more likely to get frustrated and give up altogether.