I'm currently making a CdB with Tasha's pattern, and so far it's fairly easy. The initial steps of making a mock garment from muslin is a great idea. You might want to brush up on your tailoring jargon, I had to figure out what a "selvage" was for instance, but none of it is especially hard. Sewing all the parts together by hand is the worst of it, the patterns and instructions make it really easy.