so your SFDC instance does not need any authorization? What objects are you trying to create in SFDC?what is the submot action of the form that you have created in AEM forms?

Looks like you are doing everything correctly please reach out to support  

The recommended approach is to create DataSource using swagge file. Then use this data source to create form data modelThe following video should give you a good understanding. Although the video is created using AEM Forms Cloud Service, the steps are the same for AEM Forms on premise versionhttps:/...

Are you able to submit from the form data model test editor?

You will have write custom code to do thatnot possible out of the box. this article expects some AEM developer experience yhus article explains how to do thathttps://experienceleague.adobe.com/docs/experience-manager-learn/forms/document-services/generate-pdf-from-mobile-form-submission-article.html...

Not all actions will work in html preview and print button is one of them  the documentation on mobile forms lists the differences 

It’s best if we can have a callsend me a private message and we can discuss the options I work for Adobe

Which form buttons do you want to move to the top?the button in the xdp cannot be moved

The banner is part of html rendition of your template. I will not come when you are viewing it in pdf format 

I don’t think so it’s possible using JavaScript