Dear Mikhail Polkovnikov,
Thank you very much for your guidance. As mentioned in my issue titled Understanding UI Editing and Python File Generation in 3DSlicer with Qt Designer - Development - 3D Slicer Community, the roadmap I have set for myself is to familiarize with the implementation of the components of the widgets that I need to use in my module. Then, I should connect these components together in the way you suggested. Completing these steps is time-consuming for me, but I will do my best to complete them.
Best regards.
Shahrokh