So far I've just avoided tagging my artist name because I just simply didn't know how. But upon the realization that everything I've been posting is going under "unknown artist" I wanted to figure out how I might change the "unknown artist" Tag to my username as the artist. (Cronolgical) And also how to put my artist name on a future post as I also am unclear how that works.

Add the tag artist:cronolgical to an image to create the tag and set its type to artist. Then add the tag cronolgical to all your other images.

For clarification: just add your name as a tag. By adding 'artist:' to the beginning, it changes the tag's type to artist, if it isn't already. So you can either put 'artist:cronolgical' on everything, or just 'cronolgical', it doesn't matter. But if the tag isn't an artist tag yet, you need to use 'artist:cronolgical' once (more than once is unnecessary but doesn't actually hurt anything) to set it as an artist tag.