Hi Uppo, welcome to the site. Dont worry about not knowing anything about guitar building, that title applied to most everyone on this site at one time or other. Anything you need to know can be answered on this forum, the vast amount of knowledge here is breathtaking.
Take each stage one at a time, and dont forget to read the articles on this forum about what to do first when you receive your kit...
link here http://www.buildyourownguitar.com.au...ead.php?t=1895

As for a colour its your choice, red goes with a lot of colours, google it.
Red and...black, white, red, purple..the list is endless.
As for the copper shielding that is essential for stopping feedback from the electrical wiring and pickups. You usually insulate the cavities and back of the pickguard if it isnt already done. Cheers, happy building..