I am creating a website for my business.

I am creating a website for my business. I want an electronic signature application form on it, so it can be signed and submitted immediately, how do I go about it, please.

The following guides can help you to create your form. 

User Guide

How to Create Your First Web Form

To add a signature, please check this guide:

How to Add an E-Signature to Your Form

You can find here how to embed your form:

Embedding a Form to a Web Page

Which Form Embed Code Should I Use