I'm afraid that I list VG first usually because that is how my juices were when I bought them. With that said, if you specify, (as people usually do) well, I'm not sure it matters that much.... Just, read your label.
I think starting out 50/50 VG/PG is a reasonable starting point for a new vaper, with the caveat that you may settle with a different ratio in the end.
Just remember, OP, since I know you have a lot of questions going at the moment, you may get conflicting answers and remember that in the end YOU will be vaping, YOU will be purchasing your device, so it's good to get some background, but sometimes too much information at once is as problematic as too little.
You seem to have narrowed down what you "want" in a device, but at the end of the day, go with the one that seems best TO YOU. You can always change things/add things, and whatnot, what you can't really do is not learn from your first purchase. It may be just right, or it may not. My path to vaping was scattered with errors, and you will need a backup device if vaping starts working for you anyway. So ultimately, in the end pick a place to "land" and go from there. Too high or too low VG can be amended fairly easily. You can figure that out but make sure you have chosen your device FIRST, as that will help people give you feedback on juice types AND probably nicotine ranges, depending on what mod and tank you get.
Anna