I have included links to the directions I found that made the project easier for me to complete.
Here is a graphic provided at Samanta’s blog:
Graphic of Samanta's fat bag
I started off with the mistake of not chaining a long enough chain. While the graphic shows 14 hdc in the foundation, the pattern calls for 32 hdc (I chained 33 and made my first hdc in the 2nd chain from the hook). The blue stitches are where the crocheter is supposed to notice that not every stitch is drawn. I did notice, but not until I had finished the body of the bag.
I frogged that, started over, and got this:
Body of the fat bag
Once I redid the body of it, the fat bag was ready to line where it sat for months later until I found thisawesome tutorial. Using both photos and words, the author, Kel, explained how to line a bag so well, that I was able to overcome my inertia and line the bag. Here is the result:
Future fat bottom bag with the lining FINALLY sewn in
Once I had the lining in, I used thisexcellent tutorialfrom Bend Beanies to figure out how to gather the body of the bag and add the straps.
The finished fat bag
So, thank you to Samanta for sharing the design of her awesome bag, and thank you to the fabulous community of crocheters who took the time to share the knowledge they had gained making it.