Here's a tutorial to help with some basic understanding of how to create a form from scratch. The tutorial covers:
- Adding a form through the Page Layout wizard.
- Adding text layers and enabling a text layer for input.
- Making a text input required for form submission.
- Making the user input appear in the subject of the email.
- Labeling information inside the email.
- Some basic tricks for duplicating, aligning, and resizing layers.
Make sure to post any questions in the comments.