Hi @Masoud Sedighi
I find two articles about how to create custom list form and create a List workflow based on the SharePoint Workflow platform, you could refer to this two articles to check which step you are stuck on:
https://social.technet.microsoft.com/wiki/contents/articles/23955.sharepoint-2013-building-custom-forms.aspx
https://video2.skills-academy.com/en-us/sharepoint/dev/general-development/creating-a-workflow-by-using-sharepoint-designer-and-the-sharepoint-wo
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.