Hello! I am looking for ideas on how to landscape my front yard (mulched area only). I have been unlucky with landscapers and toying with the idea of just giving up and doing it myself. I am struggling with figuring out which plants will be suitable for the space and existing plants, the layout and any other elements (gravel, etc) that can work well so it is a relatively simply yet cozy and low maintenance design.
What I am looking for plants wise is: no/low pollen as I am allergic, bord attracting, leafy but hardy. The front yard is north facing and gets full sun in summer (multiple heatwaves 40+ degrees) so plants would need to love sun but the righthand side gets shade from the jacaranda tree. I also have pencil pines on the other side of the driveway and want to move the small pencil pine there. Coverage for privacy where the windows are would be great too.
I have 2 Viburnum Dense Force along the fence and it has been suggestsed to buy 3 more to make a hedge of 5 Viburnums along the fence (once I move the pencil pine). Would this work? I would let them grow naturally and avoid shaping them as I like that rustic, natural look.
Plants I like: Ornamental cherry blossoms, lavender and Birds of Paradise (the orange ones). I have been told that these don't relaly fit with the pencil pines and the jacaranda but have not been given a "it is impossible to do" so I am hoping it still can be done somehow? I really like the cottage feel but aware that this is not really feasible because of the weather/environment difference and I am happy with a leafy garden with various shades of green. Pink, purple, blue, dark red and white flowers. Orange is good too but not yellow. I really like jewel toned colours.
The space does not have to be completely filled with plants, even no plants at all would be an option. I want something that I can easily maintain, i.e. no weeding, pruning, hedging, etc. (or mowing - no lawns please), can grow to full size without any shaping, hardy, drought tolerant. Happy for other elements (gravel, stones, etc.) to be used as well. I would like to keep the Agaves but happy to relocate, happy to remove the Grevilleas and the Jade plants as they are not working out anyway.
Sidenote: I also need retic installed. I know retic should be done first but I imagine the spinkler placement would be affected my the landscape design?
Any guidance and advice from experienced people would really be appreciated as I am totally lost. Thank you!
Edit: Thank you for all your comments! I am based in Perth, WA and the front gets really heated in summers. The Jacaranda does provide shade, mostly where the grevillea closer to the fence is. Prefer evergreens so the garden is leafy all year round. Simple design plans would be much appreciated as I have no idea how to put all the suggestions together.

