In front-end can simply create CRUD operation. Pls help
Everything you need for creating and updating content from the front end is covered here: https://docs.craftcms.com/v3/dev/examples/entry-form.html
For deleting you can use the
entries/delete-entry action (goes without saying that you'll need to add some kind of security checks).
Based on your comment for forms, I would suggest either:
They both take care of all the hard parts of form building and submission. Building a custom form submission with all the same features would take you a long time.