I agree, when start resining & glassing, start with something small; gloves or boot pieces. I'm probably going to start glassing the small parts first because it's been a while since I've done any glassing. But I'm doing the papercraft on the helmet first, that way I ensure I have a good starting point.
If you have problems with technique, try downloading some of the primatives from the pepakura site (
http://www.tamasoft.co.jp/pepakura-en/), and practice on them.
If you have technical problems, post more questions
but read your products directions, each one has differences, and sometimes they address common problems.