Shopify Shipping Rate Configuration (Australia)

I’ve reached the point in my store build where I need Shopify’s shipping settings dialled in properly. My priority is to have clear, reliable shipping rates showing at checkout, and I want them organised by state rather than by individual country or postcode... (Budget: $8 - $15 AUD, Jobs: JavaScript, PHP, Shipping, Shopify, Shopify Development, Shopify Templates)