the lawn in my backyard is dead due to lack of sun, I would like to start growing a grass but I need some suggestion about what type of grass to use and what type of soil to use.
Fantastic to have you join the Bunnings Workshop community, and thanks for your question.
Let me tag @MitchellMc who will be happy to help.
For a really shady area you will need a 'sun & shade' variety if you want to plant from seed.
If you want to lay roll-turf then you will likley have to go to a specialist supplier or direct to a turf grower in your area and ask them about available shade tolerant varieties.
These varieties will often just be described as something like ST85. The ST means 'shade tolerance' and the 85 is the percentage of shade, so ST85 would tolerate 85% shade.
If it's deep, deep, deeeeep shade then you may have to look at a lawn substitute or ground-cover.
Hi @Rocio, and welcome to the Bunnings Workshop community.
It's great to see you've already received a helpful reply from @Adam_W. To follow on from his response, you might be interested in Scotts Lawn Builder 1.3kg Seed & Feed Sun & Shade Lawn Seed or Munns Professional 1.1kg Sun And Shade Premium Lawn Seed Blend. Scotts Lawn Builder 25L Organic Lawn Soil Topdress & Underlay would be a fantastic medium for planting the seed into. These step-by-step articles will be of assistance: How to grow grass from seed and How to lay turf.
Please let us know if you need further assistance or have questions.