I have just cleared out an area under the house - a small room at the back of the garage that connects to the laundry/come storage room on the other side - a bit hard to explain the layout, but it works perfectly now as a second office/study area that I am using to gather and sort literature for further study. It has a large filing cabinet, desk, sorting table and lots of shelving for pre-sorting piles of literature which I have accumulated so effortlessly over the years! It comes with window views out to the garden and lovely water glimpses (if I open the garage door) and is lovely and cool in summer. While it is well organised and tidy, I have deliberately left it fairly rustic (read 'man cave' like) as I don't want to feel like I need to be 'cleaning and tidying' while I am there. I have a stack of classical and choral music that I play while down there ... in between listening to the cricket in summer, of course! Some great names in here re what to call it .... perhaps my 'She Nook' or 'the Reading Room'

i love bamboo, giant bird of paradise etc but do NOT put next to your pool. In our last build we used Zanadu. Big leaves that do not drop and bullet proof. Perhaps find another way to cover the fence other than plants that almost always drop their leave and have invasive roots.

Perhaps check with your local council to see if they have a plant list. Many councils here in NSW do this to assist homeowners with choosing native Australian plants and some introduced plants that grow well and are in keeping with the area. Of course it depends on the look of your house and whether your landscaping plan will compliment that, or whether you want a manicured look, or a natural look, cottage garden look (e.g flowers and hedges) or a beachy look (e.g. if you have a pool) and so on. Fruit trees sometimes need a different aspect to other trees, so separating food trees from general foliage is something to consider. Oleanders are off the list in many parts of NSW too. We recently put a fence in similar to yours but it has been painted black as our house is modern. We've been advised on lomandra, banksia and grevilias and lili pillys for a native garden as we already have lemon scented gums and ironbarks on the property. If you consider the building style of your home, and the trees common to the area you're in, sometimes that can give some inspiration

Depending on how much sun you get wisteria, hellebores, potato creeper, star jasmine, ornamental grapes, bougainvillia, clematis - there's an endless list. Figure out how much sun you get and head down to your local nursery, the horticulturalist there and they'll give you good advice on what your options are and how best to keep them happy.