There is nothing easier than to go at our website, go to SUBMISSION section on top in the menu, read through the page and then click on SUBMIT. You will get in touch with us via e-mail and we will be happy to help you with everything from contract to prepare your visual data.
I also recommend to check out this thread "How to prepare data for Nanits app?".
If you have any other questions, feel free to ask in the comment section below :)