Without being sure of what those windows are from, it might be worth considering creating a flat roof/ deck on that single garage and replacing the first window with a sliding door to access it. Continue he same balustrade as your fence with have and create a terrace. Slatted balustrade might provide the privacy in screening, and a nice place to stand out at evenings. I think a colourbond roof would modernize this home in the right way, it's low pitch is suited to doing so. As for the windows, I personally like timber awning windows for this style home. Although I think a louvre window would look amazing where that long narrow window is, and if it happens to be within your stairwell, it would create a fantastic breezeway and vacuum the hot air upwards and outwards. The main structure of your garage, I would create post and beams that jut out over the entrance path not a covered roof, just the beams, which would be the joists from the garage roof/ deck. This would tie into the architecture and soften the boxiness of the exterior facade. Also it will direct you through an interesting entrance and lighting and landscape details could really wow you.

It all depends on how you want to use your front yard. I live on a corner block and in an old suburb in Canberra, where hedges are everywhere and for good reason, Privacy! You're front yard is a little more magical too when you aren't exposed to the street. I definitely would plant a tree in the corner so in time it overhangs and softens the driveway but please research the tree first or it could be a disaster. If you're not into hedges then garden beds at the front and around the corner, edging is a must, maybe a sculpture or garden feature not small but more of a statement piece. As already suggested, have a look at pictures on Houzz I'm sure you'll fall in love with something that suits you're lifestyle, and don't forget to add some soft garden lighting, good luck!

The best way to 'hide' something that you don't like is to draw the eye elsewhere. The screens etc that have been recommended with vines over them are not a good idea. I would suggest 3 trees within the lawn area and not in a perfect triangle. One could be placed in front of the problem area. Eventually you could make a garden bed of decent sized proportion, that would have all trees within and underplant the trees with the same low plant throughout - like a good native grass like plant. The use of the 1 plant will make the area look even bigger and will provide unity to the design.

I’m a big fan of dark trim but I’m not sure it’s right for your house. The parapet trim may look too top heavy in a dark colour and make the house look lower/shorter. See if you can try out a dark colour on me if the online visualisers. I’d prob aim for a slightly, very slightly Mediterranean or Spanish style (inc garden) and use all white on the house. With black fences, garage door and letter box.