The Videos on How2RC are always Free and so is the advice. I started this site after seeing so many basic building questions on the forums. What glue do I use, how do I solder, how do I cut these, basic building skills for Planes, Boats, Cars, and Trucks.
I have build threads here following the steps to build a plane or a boat. The Polaris Seaplane see the Polaris Project.
Everything you need to know to convert a T-Maxx
To Brushless Battery power
Putting hardware on boats
-- available on basic building skills now