I missed this topic so far, and it has run almost a day already. You can't take time to have dinner with your parents anymore
There are a few online netting supply shops, but I have no experience with any of them, so google and search for a fairly local one if you want to buy netting needles.
If you are in England I have an e-mail address of the shop I buy my needles.
For a net to transport things I would make a tube with one closed end, string a cord through the other end, knot the ends of the cord, and there it is.
As a beginner it might be easiest to make a piece of net that is basicly square or rectangular and sew that together. But once you are familiar with the basic netting knots you can make one in one go.
Make 6 to 12 loops on a string, tie that into a small loop and attach the end of the string to a hook or other fixed point.
Now make 2 mesh in each mesh, (that is double the amount of loops,) when you come back to your starting-point you can either tie a netting knot or an overhand knot in the first mesh of your base row, and an other overhand knot in the bottom of the first loop of the second row, and such make a neat row each time, or you can ignore the transition and just work on, this is a little hard in the first few rows but makes work easier in the body of the bag.
I often double the amount of mesh twice at the start of the net and then do a couple of rows with just one mesh in each of the row below.
When you spread the net it should lay flat on the table but there need not be extra space.
You can work on till your net starts not laying flat anymore and add more mesh if it is not wide enough yet.
After it is wide enough it is just going on with netting till it is long enough.
If you have decided to spiral, that is ignore the start of the row, use the last mesh you made for one end of your cord to close the net.
Willeke