Not a clue on the addon GUI

[siweia]

I try to create a GUI for my addons, which I just change settings in a simple config.lua for now.
A simple GUI panel has been created, and it can sucessful change the WTF files by toggle the options.
But I found it quite difficult to link my addons to read from the saved variables once I change the settings.

Most of the GUIs are created by Acelib, but it's too hard for me as a newbee(especially a med school student).
Is there any link or tutorial that can help me to start with?