and what do you think about this lense, thank you
Unfortunately, it will not autofocus on the D40. The D40 requires Nikon AF-S designated lenses or Sigma HSM designated lenses.
Nikon makes a 55-200 VR lens which will autofocus and a non-VR 55-200mm, as does Sigma. Link to Sigma:
http://www.sigmaphoto.com/lenses/lenses_all_details.asp?id=3326&navigator=6
Nikon also makes a 70-300mm AF-S lens [...]

I would want to use it when it rains and snows. What precautions should i take??
They sell covers that are meant to protect your camera in different weather situations. I wouldnt bring it out in the rain and I would be very cautious about using it in the snow, the water will get in and [...]

I am aware the fuji is not SLR and the Nikon is (dont mind, not necessarily looking for an SLR, just a good camera that will allow me to experiment!) i can get the s5800 brand new for £87 thru asda, as i work there with staff discount etc. however i’ve seen the Nikon D40 [...]

iPhotoForum
It’s a privately owned website that is nothing more than a message board for photographers. I used it heavily when learning the basics. The nice thing about here is that you can post your photos for critques. The other members will tell you what you did right and what you did wrong.
It’s [...]