MissSeraphim said: I am the artist, I dont know how to make it a tag thought -w- Name: Miss Seraphim
You shouldn't upload your own art; Danbooru is for uploading other people's works. This will probably be deleted for that reason (although I think the image is decent). The only way to get your art on Danbooru is to upload it somewhere else (eg. Pixiv, DeviantArt) and become popular enough that someone else decides to upload it.
Edit: Though to answer your question, you would type artist:miss_seraphim and the tag would be created as an artist tag.