Issues with Multi Step and Post Submission Form

Hello Sir,
I am using the Jet Form Builder for Gutenberg. I want to create Two(2) Types of Forms with it— a Multistep Form, and a Post Submission Form.

ISSUES: Multi-Step Form
a.) I need a Progress Bar at the Top of the Multi Step Form.
b.) I need the User of the Multi Step Form to be able to go back to the Previous Page.

How do I achieve these?

ISSUES: Post Submission Form
1.) I want the Post Submission Form, to be available only to Logged in users, with the Contributor User Role. How do I set this up?

2.) Now, the default User Role on Registration on my website is Author. Is there a way I can ensure that upon registration, certain people will be upgraded to Contributor User Role?

3.) How can I set it up, in such a way that if someone tries to access the Post Submission Form, it will automatically redirect them to the Login Page. And if they Log in, it will automatically redirect them to the Post Submission Form?

Needing to hear from you soon.
Regards.