Are there any tutorial for beginners ?

[pravin-d]

I'm trying to create a stats page. For this I need to read a bunch of files, format a bunch of tables in the file based on page properties(dataview properties) and tags in particular location in wrt the table.
I was trying to do the same with dataviewjs. It seems to work but there are subtle issues and code organization is becoming a problem. Hence looking into Runjs.
The problem here is that Runjs docs say we can use any code and examples seem a little complicated.
As a beginner I would want some basics things like

• How to read file content ?
• How to read tags in the page or find pages with a given tag ?
• How to create a new table or element in a page to render the some text or maybe a chart ?
  Even though these may not necessarily involve Runjs and maybe I have to use obsidian module, it would adopting runJs very easy.
  Any help here would be appreciated