Well... with free subscription u can do almost everithing. Submit arts, fanfic...add people to watch list, add arts to favs. U can edit your profile. Everything u will find in right on the top < can u see list? >
It u wanna edit profil, just *clik* it ^^ If u wanna submit deviation just do it ^^
...sory but I'm dont get what u meen by that: 'ups and downs of deviantart'