Once you've downloaded it, you might also want to check out the links in this thread:
http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2733873

As people have mentioned, the interface can be a little hard to get the hang of.

Quote - Well, I want to create scenes such as natural landscape and such and maybe do some modeling and then animations.

Blender can do good grass and I think there's a landscape generator script out there somewhere.  I think you can get Vue trees into blender, but they'll be static meshes, so they won't animate easily in blender like they will in vue.  I'm not sure there's anything for generating trees in blender itself that will--but if anyone else here knows of one I'd love to hear about it!  Probably easier to go from blender into vue if you want landscapes, if you're planning on getting vue anyway.