Welcome to Treadlestitches!
I'm making mine with scraps and strips scoured from bins and boxes all over the house.
Here are a few hints that have helped me, for what it's worth.
1. You can get all the pieces you need from a 5 in. strip if it has at least 19 in. of usable fabric. Cut one 5 in. square, 2 rectangles 2.5 x 5, and one large rectangle 5 x 9. Slice the large rectangle LENGTHWISE to get the last 2 rectangles, which will measure 2.5 x 9 each.
2. When making the first part (the "Happy Blocks"), press all the seams out from the center. Everybody else probably knows this, for some reason I was trying to press towards the dark. (Sound of hand hitting forehead).
3. I was having trouble sewing the longer rectangles on, and having everything lined up. Throwing a pin in at the end really helped. This is probably just another "me" problem, but it really made a difference.
We need all the positivity we can get!
Linking up with Bernie at Needle and Foot