That's ok ^^ well since DA has updated it's really easy now.
On your page near the the top, you should see a button say "Submit Art" click that.
Then all you do is follow the rest.
(so add your title, select what category to put it in, click file and find the piece on ur computer to upload. Write something about it and tags - so ur da name, the charater u've drawn so like anthro, chibi, fan art name etc. Click on what mature content it is -Nude, partially, none. Then click submit and ur done ^^)
The next part is if you want to add it as a print, if you do follow the instructions, if you don't click on " View deviation" and your done ^^
I hope that helps