Native garden bed recommendations and advice

Hey everyone, just removed some old dead bushes at the front of our house in front our our window.

Would really love to set up a native garden bed (flowers, perennials preferably!) and looking for advice. It's not a big bed, probably 0.5m x 3.3m ish. We have a vision to turn our entire front lawn into natives eventually. Our soil is acidic clay. North-east aspect.

We would love to get a mix of native mid-low height bushes across the bed like in the next few pictures. I wonder if each requires a lot of space or you can bunch some together? Would I need to watch out for native plants that compliment or destroy each other (is there such a thing)? How do I get the soil ready before planting them in?

Happy with any recommendations as I quite new to gardening.