How to Insert data in Custom table

How to Insert data through our custom form in our own custom table created in db of nopCommerce

Its not simple to describe it on the forum

You can have a look at https://docs.nopcommerce.com/en/developer/plugins/plugin-with-data-access.html

You might also want to have a look at the Nop.Plugin.Shipping.FixedByWeightByTotal Plugin which creates a custom database table and uses a form to insert the data