Upload & Sell: On
Calvin, one of the things I have learned on thsi thread is that not all shots lend themselves to 3D. In particular, one needs "enough" spatial differentiation between the foreground and the background. Obviously this situation did not let you get close enough to the train for that degree of separation to be achived.
If maximising that impression is what you are after, I suggest that you crop much tighter around the train. Then the fact that the "rear" tree is OOF becomes much more noticeable, and you get some 3D effect. But it becomes a different shot, with different composition, so it may not be what you want. I can post my 2-minute tweak if you like.