You don't have to add things on DA if you are a member, but then, why become a member if you're not going to use your account?
Submit -> Submit Art
Submit -> Submit Art
On your deviantART page, simply click the Submit Art button on the top right-hand side of the screen.
Sadly, you can't. (yet?)
Coppa compliance for websites means you must be 13 or older. So yes, you can be 13 and a deviantART member as deviantART is coppa compliant. You cannot be 12. :)
First you make an account. Then click submit and there you are =3
go to your page, click, 'submit art'
the people who made it.
If you are asking whether you have to create the artwork for the prints yourself, then yes, you do. If you are asking whether you have to get the artwork printed yourself, and then sell them through DeviantART (like you would on ebay), then no - DeviantART does all the printing itself. All you have to do is create the artwork, submit it to your profile and then submit it as a print. Whenever someone orders a print, you get the payment and DeviantART does the printing and the sending.
To upload GIFs on DeviantArt, go to the "Submit" button and select "Deviations." Choose the GIF file from your device and fill out the submission details. Make sure to select the appropriate categories and tags, then click "Submit." Keep in mind that GIFs must adhere to DeviantArt's size and content guidelines.
There's a button on your home page titled "Submit Deviatations". Click on it, and fill out the submit form.
Click the button that says submit and then Artwork... Fill out what you need to and then click submit artwork at the bottom of the page.