Posted: 16/03/2016 at 10:14
Tackle a bit at a time, less daunting than thinking of the whole lot. You have quite a few stinging nettles in there so be careful! If you want a wildlife garden they are good for certain caterpillars and butterflies, but I would confine them to a corner. The rest need digging out and their fine orangey roots run sideways.
As Fairygirl says, I would tidy up, remove anything that you really don't want. Then sit back and plan with a good gardening book.