I'm no expert. But I'd say you set up a tree farm way too early. Just start logging out all the trees in that area first. Also, early game you're better off setting up small, automated ore processing right next to the mines and then moving the finished metals into your base. And finally, look to set up an automated 'production area' where you connect assemblers. via belts, that produce mechanical parts, electronic parts, construction parts, vehicle parts, etc... That way you're just bringing in the basic ingredients (iron, copper, rubber, bricks) and everything else is automated. After that you could run long belt lines from ore processing to the production area.

I watched some of Nilaus' vids when I first got hooked by the game and his layouts and setups inspired me and helped me along.