New to modding

[Perseus]

Hi I have read some of the wiki but I can't figure out how to add a new race to the game. And how to modify the childhood/adulthood backstory, I have been following these guides but It's been hard going I think I need some expert help.

https://ludeon.com/forums/index.php?topic=1681.0
http://rimworldwiki.com/wiki/Modding#The_basics:_Defs