I adore both Interia and Lo and Co Interiors for hardware. They aren't cheap but I wouldn't say they are super expensive. If you use some of their statement hardware, you could just do them on lower cabinetry and leave the upper cabinetry as push-to-touch and keep it simple and a bit cheaper.

my suggestion has access to the walk in pantry (and laundry) through the kitchen with an optional sliding glass door...the "extra pantry" on the right uses the space INSIDE the dividing wall for tall, shallow cabinets with multiple adjustable shelves, deep enough for most cans, bottles, glasses, sauces, oils, cups etc etc The walk in pantry could have counters, under bench drawers and wall storage.. re-arranging the kitchen allows space for microwave, mixer etc - be kind to each other in your very first home

Ok so after all the feedback I made some changes. After looking at it, I would like to make entry point from garage on the garage wall, so you still enter into pantry, but you dont have to walk through pantry to gain access to the house. I would also like to flip bathroom and bed 3 so bathroom is centred between rooms. Also not convinced I should have entry to lounge from kitchen, should I have kept it entering from the entry. My only issues now is, do you notice how the bathroom steps in? This is because the ensuite is a bit bigger. Will it look ok once built or do I take that 30cm from my ensuite/main room to level it up? If so do I take 15cm from ensuite and 15cm from main bedroom? Also I really wanted the compartment bathroom that oklouise suggested. But its not big enough. Any ideas? My current bathroom is 3100 x 2600.

You could consider custom joinery that actually looks freestanding - purposefully creating a gap from the edge of the fireplace surround to the wardrobe & on the wall side also. This would also mean that it really does not matter if the front of the cupboards do not align with the front of the fireplace. Adding a nicely detailed leg, and a feature handle (you can get some really unique Australian made ones these days) to give some visual interest to the otherwise minimal finishes. Keep it simple & classic so it ages with your child's taste and preferences. As an example, The Design Files recent article has an image of a cupboard in a lounge area, that could be adapted to two double door units on either side of the fireplace https://thedesignfiles.net/2019/10/interiors-house-p-cjh-studio/. Seems perfect for a child of any age, or even if you want to convert the room to a more 'grown up purpose' once they leave home ;-)