http://www.firstroboticscanada.org/site/resources
Know everything on the second half of this page by heart(the stuff not pertaining to Canadian teams and events), especially the pictures of designs people have used in the past. The presentations are likely things you already know as an engineer but you should still check them out to understand how the concepts apply to robotics.
Don't be afraid to ask questions on this site, just know that if you want an answer quickly you need to ask a specific question.
See if you can visit the facilities of another team in your area and meet with their head engineer. This way you not only can develop a working relationship with someone near and in your position but also understand the subtleties of building in your area and what resources are available to you.
Don't turn into one of those mentors that ends up building the robot. FIRST is about the kids and your job is to keep them safe and teach them the fundamentals of engineering, everything else is secondary and its better that they learn and loose in competition than win and not understand what was built.
Hope this helps
-Simon Strauss