You just said the magic word "fun". Thats what it should be and not seen to be or feel as if its a task, which is a really easy trap to fall into. If you get stuck or feel a bit dis-heartened, put it down, go do something else and come back to it later.
I used to sit doing runs and scales for hours on end trying to hammer it into my head and learnt practically nothing by it. You only "really" learn if you enjoy the practice and the study that you are doing. The chord thing seems impossible sometimes but then all of a sudden you pick up your guitar and find as if by magic your fingers go automatically to the correct positions and that is you for life, you're fingers will always remember what to do with chords once you have mastered them.
Its just muscle memory, which we all can learn if we apply ourselves.
There is a multitude of sites out there that will give you free info on technical stuff for guitar, a thing that I never had when I started. And I'm sure the same goes for most of us in here. So take full advantage of it