Set up a social network on ELGG

 Good day, 

 I am totally new having no skills in the area of ​​development of a social network.   
 How to start for installing components on Ubuntu Focca Fissa /20.04/2 LTS from the

 terminal " sudo apt ........ " ?
 What are the chronological steps to follow to set up my own social network from the sections of ELGG's website ?

 Thanks so much for your kind detailed information. 

  I look forward to hearing from you.

  My best wishes 
  Denis Ferret