I’m a very shy person I want to hide my activities, comments, favorites, and anything like that.
I don’t think that’s possible, even with a premium membership. But even so, what would be the point of doing all that? The whole point of deviantART is for artists to be discovered, for you to find others and they find you, and share art and all that. Totally masking yourself defeats the main reason deviantART exists…..
Im not sure you can do such things unless you have a premium membership.