Q.How To Mix Good Soil
What are the ingredients I need to make soil for a raised garden? The pre-made mixes are really expensive and I wanted to do it myself. What and how much of everything would I need?

Certified GKH Gardening Expert
The following articles should be of some help to you:
https://www.gardeningknowhow.com/edible/vegetables/vgen/raised-vegetable-gardens.htm
https://www.gardeningknowhow.com/special/urban/raised-beds-for-urban-settings-no-digging-required.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/what-is-soil-made-of-creating-a-good-garden-planting-soil-type.htm