Foil is the last thing you want to do. You have alot of reading to do. Everything you need to know is in these forums
Again agree with that.
You may have to look a little harder but def a better idea. I just got back from the party store (balloons, wrapping paper, party favors and what nots) Obviously they have a good selection of wrapping paper right now. Took me a minute but found some "foil wrapping paper", tore away a bit of the plastic and looked behind it to find it was reflective! Took it to the register and it rang up as "Mylar assorted" DING DING DING!!!! Was like 3 bucks for a 6 foot by 24 or 30 inch roll.
It may be a bit of a pain but I'm sure your going to want to go with it.
If you HAVE, HAVE, HHHHAAAAVE TO use the non shiny side of the foil with those instructions.