When I first picked up Unity3D to play with I was very frustrated as well. The more I used it the better of an understanding I got. I am still far from an expert but I was able to make some interesting projects to play around with at home with the Wife and kids. When I hit a hurdle, I often found a solution on YouTube from one of the many tutorial channels out there. One of my favorite is Brackeys[1] - I believe he is sponsored by Unity however he has some quick but detailed videos on creating almost everything.

[1] https://www.youtube.com/user/Brackeys