Sashiko is a great hand sewing project. Easy for beginning sewers or advanced sewers. In addition, it is perfect for sewing on the go.
To get started, all you really need is a pattern like these, thread, a needle, palm thimble and a pair of snips.
Here is a great video to get you started. Although she uses a hera marker in the beginning, you can skip that step if you are purchasing a patterned piece of cloth. It includes great tips for back-stitching to get started and the comfort of not “perfect” stitches.