Hi. I just want to point out that its WE not Well. I believe Well make a G36 lpeg (aeg) that is cheap rubbish, so make sure you are searching for a WE G36 and not a Well one
As for a review, here is one: ( http://airsoftodyssey.blogspot.co.uk/2013/06/we-g999c-review.html )
It applies to the compact model however the internals should be exactly the same, bar the barrel length and cylinder port.
Drum mags are available from a few places though they are not always in stock. This site has a few at the moment: ( http://www.justbbguns.co.uk/product/70/Magazines/149/Rifle-Magazines/758/2300-ROUND-SR36 )
It will almost certainly fit, as long as the WE model takes regular G36 aeg mags (which it likely does).
As for a scope, look around, there are tons of options. Personally I suggest something relatively cheap as it could get damaged on the field!
Hope this helps!
Andrew