This is probably the best starting point. The tuts here range from beginner to advanced. https://blenderartists.org/forum/viewtopic.php?t=4624
Also check out the Knowledge Base http://www.vrotvrot.com/support
Hope this helps.
P.S.
This pine tree project is very nice but it is also extremely taxing on your computers memory (TONS of vertices). I wouldn’t recommend it as a first project. It’s no fun trying to learn Blender when there’s a huge lag time in moving your objects. Learn the basics and then come back to it.