[douche]

C# the language is pretty simple, or at least it can be - you can produce some monstrosities if you really try, but some of the gnarliest bits of C++, like arbitrary operator overloading and template abuse, are pretty blunted. The difficulty lies in the extreme breadth of the ecosystem - just the libraries built into the .NET framework itself could take you years to acquire a healthy knowledge of, not to mention the couple dozen most-commonly-used libraries on NuGet.

Ultimately, I think the best thing to do is just jump in and start a project that you're interested in. Accept the fact that you'll be hitting StackOverflow all the time, and when you're there, pay attention if you see comments and answers from Jon Skeet, Eric Lippert, etc. There are some decent email link-dump newsletters that are good and have a .NET slant, like Morning Brew[1] and Morning Dew[2], which can help keep you up on what's new, and often link to articles explaining various nooks of the .NET world. Avoid CodeProject - most of that shit is old, poorly written, and as often as not incorrect. Once you have your bearings a bit, C# In Depth[3] is a great resource on the nittier, grittier details of C# and the .NET framework.

[1] http://themorningbrew.net/ [2] http://www.alvinashcraft.com/ [3] http://amzn.to/1fv0zNH