The free PDF templates are available HERE for download/printing. I'll add some descriptions of what each step-by-step photo is showing a bit later.
This is a pretty intensive project. It would likely take fairly experienced crafters a full day to complete from start to finish. It took me parts of 3 days in between tending to my family, fittings, and taking the staged photos.
I stitched this example up with all white thread to make it easier to see the seams. :)
You can use ribbon, webbing, or make the straps. Connectors can be snaps, velcro, buckles, etc.
I made this example with webbing, but I have made my own straps and used snaps before as well.
I added hook & loop to attach the hood to the straps. Last time I used snaps.
This is my 52"+ tall, 63 pound, long-torso son wearing a doll that is slightly larger than the average size newborn.