Learning D

[Ryan via Digitalmars-d-learn]

Me: Software developer for 30 years.

So perhaps this is old fashion, but I wanted to start using D by 
whipping together nice little personal utilities.

I tried installing MonoDevelop and Mono-D.  I can't even figure 
out the basics, such as adding references to a project.  There 
are no options in the context menus, and although it looks like 
drag an drop might work (a '+' sign appears by the cursor), 
dropping a file from the filesystem doesn't work either.

Although I dream of someday being able to add a reference to a 
project, I'm not really sure what I might drag in.  I managed to 
download and compile GtkD, since it seems like a GUI would be a 
nice place to start (again, old fashion).  I got three *.lib 
files out of it... Hmmmm... Maybe these are references??

I had installed the Visual Studio plugin, but I don't want to use 
this since I would like to eventually migrate away from Windows.

Let me cut to the chase.  I have no friggin' clue how to start, 
and I can't seem to find a tutorial anywhere...

What IDE should I use? I'm not big fan of Eclipse, although if I 
had to use it this wouldn't be a dealbreaker.  Give me something 
easy and lightweight, unless you've got a GUI builder (this is 
why I started with MonoDevelop, though this isn't working so well 
for me).

What Widget library should I use?  I started with GTKD, but since 
there are no tutorials does this mean nobody actually does this?  
Should I use DWT?  What about QT?

I just want something simple and mainstream to start learning D 
with.

Any thoughts?