Hi Yesooh -
Please start be reviewing the following help pages. If you have specific questions, feel free to follow up.
https://www.energycommunity.org/Help/Supporting_Screens/Load_Shapes.htm
https://www.energycommunity.org/Help/Transformation/Peak_Load_Data.htm
https://www.energycommunity.org/Help/Transformation/System_Peak_Load_Shape.htm
https://www.energycommunity.org/Help/Transformation/System_Energy_Load_Shape.htm
Best,
Taylor