README: Better startup script description

README.md

@@ -75,11 +75,11 @@ Uninstall Oh My Fish.
 
 # Advanced
 
-## Startup
+Oh My Fish installer places its startup code in your fish config file (`~/.config/fish/config.fish`).
 
-This script runs each time a new session begins, autoloading packages, themes and your _config_ path in that order.
+## Startup
 
-The _config_ path (`~/.config/omf` by default) is defined by `$OMF_CONFIG` in `~/.config/fish/config.fish`. Modify this to load your own configuration, if you have any, as discussed in the [FAQ](FAQ.md#what-does-oh-my-fish-do-exactly).
+Everytime you open a new shell the startup code initializes Oh My Fish installation path and the _config_ path (`~/.config/omf` by default), sourcing the [`init.fish`](init.fish) script afterwards, which autoload packages, themes and your custom init file. For more information check the [FAQ](docs/FAQ.md#what-does-oh-my-fish-do-exactly).
 
 ## Dotfiles