I recently had to move to a new house in the Eastern suburbs of Sydney with my daughter. The place looks nice and quiet, which is exactly what we were looking for. And the other upside of this move is the small backyard I inherited along with the house. The only problem is, that the outdoor space looks completely abandoned and overgrown with all kinds of plants and weeds. As much as I like taking care of plants and working in the open air, I am not sure that I know what to do here. I want a nice and maintained garden with some rocks, flowers, maybe a deck even. But this is not even close to my dream garden. So, I think I am going to look for some landscaping help. I need someone to help me clean all the shrubs and the grass, and arrange the general outlook of the garden. Once all this is done, I think I can continue with the maintenance of the place by myself.
So, my question is, does anyone here know a landscaper or a landscape designer (I'm not sure which is the correct term)? I need someone responsible, who will do the job right. I would also accept suggestions on what plants should I plant once everything is ready. I like bright colours, so please be creative

To make it easier, here's a picture of my backyard: