I cheated a lot on this... I used the skirt hem as the shirt hem, cut the front from the back and the back from the front, using the pre-existing button band. Which all added up to a two day sewing project. Yay!
The skirt I used was made from a slippery cotton lawn. It was a bit tricky to sew, even though I starched the heck out of it. This was also my first time sewing french seams and darts.
Colette Patterns rates the Sencha blouse as a beginner project, but I think I would have gone a bit nuts if this had been my first project. Or even if I had done all the button band and hem work. The blouse also requires fabric with a lot of drape, which in my experience means slippery. Not so easy right off the bat. I would say it's more of an intermediate beginner pattern? Definitely a fun, well drafted pattern with clear directions.
Have I mentioned I love highly tacky prints? 'Cause I do.