Well nasmijati has much to offer. For my mind i would like to get an understanding of who you are before thinking too much ahead friendlykim. If we leave climate change, fire zones, function, ergonomics and sustainability to one side we might consider your childhood experiences, your passions, sufferings, do you like literature/ Japanese poetry? - will you have mist in the winter months? what music do you like? imagination as play in defining space, choreographing shade and light, will you have children to consider, would you consider a more elemental use of water for swimming and other opportunities in place of a lap pool? we could talk about art, what artists you love, insight beyond reason which comes through our relationship that your garden may feed your mind on a daily basis. Have you travelled? Does the north African civilization have anything to teach you for garden application? - what is your latitude? Has contemplation placed it's hand on your shoulder by this stage of your life? I should stop - for me it's not really about design, it's about the life of the mind and arousing latent, hidden aspects of who you are - your life narrative. This is how I would start making a garden for you and preferably over lunch - it is primarily about love in the end!

I would plant along the fence line trees like Magnolia (Little Gem) or Hibiscus, and there where the wider part - low shrubs under the trees or stripy Dianella. All these plants and trees are hardy and easy to take care of. Trees don't drop the leaves and slow growing. Otherwise you can place pots with bright plants (Frangipani grows well in the pots). You can mulch the soil under the trees or put some pebbles or gravel like I did (see the photos).

on top of the other comments made - do some judicious pruning of the existing bushes and trees - particularly the larger one at the rear on the left. Making bushes and trees more compact by removing stragglers and "outliers" makes for a much neater appearance - and the total cost is a pair of pruning clippers and possibly a saw. investing in a bunnings blower/vac may also be worth while re cleaning up leaves before each home open. Legally you can trim branches overhanging from your neighbours property onto your property - but not past your boundary. any sawn off limbs do remain the property of your neighbour. Probably not a good idea to throw it back over the fence however as it may engender ill feeling. without seeing the overhanging branches - I am not saying you should chop it all down - but perhaps some removal of excess branches to reduce the amount of leaves falling onto your property. Remove all weeds, consider adding 2-3 large rocks into the garden areas - part buried to make them look as if they are natural rocks jutting out. make sure you have something to hang your garden hose on - neat and tidy is the name of the game. and make sure all your garden tools, fertilisers, etc.. are out of sight. The trick is to create the subconscious impression that the gardens are maintenance free. A lot of little things add up to a big difference. removing all cobwebs is a big plus. no one will notice the lack of cobwebs - but their presence is another story. clean/replace any corroded taps, remove any fly poo that is visible, is your roof visible? if so, clean it - get the leaves off. Chimney? repaint. polishing wood inside, cleaning windows, replacing dead or dirty light bulbs, replacing tired lampshades...etc. think of it as rejuvenation rather than renovation. make sure gutters are clean - they may need a paint or part replacing if corroded. same with downpipes. clean all accumulated dust. Repaint the low brick wall on the left under the fence - a nice fresh white - make it all "shine". I used to do landscaping/gardening - with a particular focus on helping people prepare their homes for presentation when they wished to sell. A bit of elbow grease goes a long way to bringing in the offers. fresh dark mulch can really improve a garden - ask your garden supplier which one will fade the least. Don't get anything too fine as the wind can blow it around. spend the time to first dig any edges down at least 75 mm before putting the fresh mulch on so that sand doesn't come through. think about how much preparation you want to do before each home open though. If you put down black mulch - there will be a lot of work getting leaves off it each week, otherwise it would be best to not go down that route. Ants? if so - get the ant powder out. otherwise they bring sand up and mess up the nice dark mulch. and... clean those windows again. best of luck

Just a few more, and when you add lush planting it highlights it even more.