> For the complete documentation index, see [llms.txt](https://docs.lingoql.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lingoql.com/sub0/getting-started.md).

# Getting Started

Start by opening [Sub0](https://sub0.app/) and creating your project.

If your backend needs persistent data, define your **database models** first. These models become the foundation for your data structure across supported databases.

Then define your **endpoint specifications**. Sub0 generates and validates them against your data models.

Next, go to [Creating Database Models](/sub0/creating-database-models.md) to define models for **MongoDB**, **MySQL/MariaDB**, and **PostgreSQL**.


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