Keep going mate.
I find Lisa's lesson very slow going, she takes ages to explain simple thnigs BUT - there must be poeple that want to work at that speed, so I take what I need and skip on.
I'm trying to use GT to learn "properly" and so practice what I've learned every day.
I also use you tube to learn a few recognisable riffs which keeps me interested and stops basic practice from being monotonous.
It can be a slow process but you'll start to find that you aren't struggling as much as you were - it's almost imperceptible, just don't give up!