1.8 Shiny resources
Shiny cheatsheet
https://www.rstudio.com/resources/cheatsheets/
1.8.1 Other resources
Shiny Gallery has lots of inspiration and demos of specific ui components and server behaviours. https://shiny.rstudio.com/gallery/
Shiny Widgets Gallery is included in above link and introduces the main options for inputs in the ui. https://shiny.rstudio.com/gallery/widget-gallery.html
Shiny Dashboard is a nice framework for creating good looking and well structured apps with minimal effort. May get limiting as you advance and want more customisation. https://rstudio.github.io/shinydashboard/index.html