How to delete or edit submissions?

Would I be able to edit submissions (as the receiver of the submissions), or delete submissions?

Yes you can do that by following:

1. Please go to your forms section.

2. Click on the desired form.

3. Click on submissions.

4. In the submissions page choose the submissions that you would like to edit and click Edit or Delete button:

Hope it helps, please let me know if you have any additional questions.