I want to create a Lightning web component which should have the facility to add expenses records as a row. Each expense record should have expenses type, date, amount, and expenses attachment. There should be a button which will initiate the approval of the expense record. There should be an add button to add a new blank expense record and a button to delete expense record which are not approved. The Lighting web component should have the functionality to save the entire expenses form and retrieve it later to add more expenses or submit the entire form (all the expense records ) for approval.

I would like to know how do I create such Lighting Web Component?