Think about what you want to achieve. For example as it's west facing do you want to grow something taller to provide some shade?

Look at what is growing well in your neighbours' gardens that you like the look of. Those plants will be suitable for your location and climate. If you can't find out what they are you could post a pic here for id.

Plant choices also depend on what part of the country you live in. I agree with the advice above. See what grows well nearby and plant lots of it. Just make sure the plants won't be a problem in the future when they reach full size.

I agree with the comments above as well. A garden with different types of grasses looks fabulous in a coastal environment.

Your soil type may also impact what will grow best. I had trouble with planting out our front yard at our last property. I took a picture of the area I wanted to plant out to the local nursery and they were able to give me some really good advice of what sort of plants would survive.

Also, decide what sort of garden you are after, e.g. low maintenance, native, colourful, or something you need to tend to. There are so many options, but deciding what you are after will make a huge difference in the type of plants you should get.

Gallifrey your garden is beautiful, love those cute little green mounds!

You could look at growing those lovely coastal banksias. As long as they have sandy soil, they will be happy. There are also some gorgeous stately blue Echiums, the brilliant green Euphorbias, salvias, hibiscus, Chinese lanterns, oleanders and kangaroo paws. All thrive in full sun and cope with poor soils and will give you some lovely bird attracting flowers. Some of these will grow taller and can give shade, others will clump into low growing mounds. Most of these are drought hardy and frost hardy too.

I too agree with other comments.I suggest you go walking, look at what is doing well locally, take photos or look at books/internet for ideas.Gardens, like homes, are individual and it should have your 'stamp of self' on it.Get a landscaper to give you advice,it is worth the expense because you will save on doing it once and doing it well. Plus the sense of success gives you confidence to keep going and makes it enjoyable.Good luck!