Nothing new to add, but can I just give a +1 to all the links since I have used most of them along the way. The biggest help is really just the community in general. Whether it is the discord server, or the irc group, or the forums, or answerhub. I remember it was a bummer when UE4 first came out because the UDK forums were so stocked full of information and here we were starting over. But now everything is so filled up with great information 10x what the UDK forums were. It is very rare that I run into a problem that isn’t answered already somewhere. So shoutouts to everyone in the community that helps each other.