What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
My suggestion is to check this guide: Setting Up Your First Order Form
On the step 5 of the same, you can see how to add the name of your product and its price.
Right under the same is the field where you can add the link to your image.
Once you do just click on Save Product and that is it :)
This is a screenshot showing the same field:
Do let us know if you have any additional questions and we would be happy to assist with the same :)