Gerald Haslhofer 
Tutorial
https://www.gatsbyjs.org/tutorial/part-zero/
Install Node.js from https://nodejs.org/en/
Install themes - sample https://github.com/LekoArts/gatsby-themes/tree/master/themes/gatsby-theme-minimal-blog
npm install @lekoarts/gatsby-theme-minimal-blog
gatsby new minimal-blog LekoArts/gatsby-starter-minimal-blog
Other themes:
https://www.gatsbyjs.org/starters?v=2
Publish to Azure: https://docs.microsoft.com/en-us/azure/static-web-apps/publish-gatsby
Themes https://jamstackthemes.dev/#ssg=gatsby