I've been dreading this one for a while.
My advice: Put away your perfectionistic tendencies right now. Go have a look at Jane's block. It's all but perfect.
Print or trace the block diagram onto foundation paper, cut out and number as in the photo.
Note that the little "frame" around the mini star is not here. We'll add that in a later step.
Cut the two unnumbered triangles out of main block fabric. Remember to add 1/4" seam allowances there as well.
Sew these to the center star log-cabin style.
The center section will not end up looking exactly like the block diagram, but this is the easier way. Correct me if I'm wrong, but I think making it look like the diagram would require some set in seams.
Not bad, I think.
Oh, did I mention that I made two of these today?