1) others will disagree with me, but I cut along the ripstop lines to make a relatively straight edge. On a hammock I don't think being exact matters. On a cat tarp or quilt it is a little more important. It also helps you to get better at fixing your mistakes.
2)When I first started I rolled twice and then pinned. Later on you will be able to do it without pinning.
3) Sew like normal. You will get a sort of box pattern.
4)whatever the standard needle in the machine is. I heard to use one just bigger than the thread. I think it being sharp is more important.
5)Far Far away. Drinks help.
6) I use 3/4 inch. I think I read that is some standard.
The thing I like about sewing is that it doesn't matter if you are a little off. It is a lot easier to cover up mistakes in sewing that it is with woodworking. Just play around with cheap fabric and enjoy. I made a lot of worthless projects out of $1 cotton until I got good enough to mess up $1 ripstop. At some point it will click and everything will start working out. I recommend saving the harder projects until then.
Is that too much to ask? Girls with frikkin' lasers on their heads?
The hanger formly known as "hammock engineer".