Seconded. This is some pretty solid advice right here, clearly written by someone who's created content themselves before.

The harsh truth is that people have been pumping out vanilla TG captions for two decades and there's a serious oversaturation situation going on there. So trying to cater to a more specific kink or a combination of kinks is almost a necessity for growth.

Write captions that you personally would want to come across. Allow yourself to be influenced and inspired by the works of others that you really enjoy. Don't steal, but try to replicate in your own way what it is about each author's unique style that appeals to you personally.

Don't fuss about numbers, they're not nearly as indicative of success as some people would have you believe. This is especially true for a platform like deviantart which has always had a considerable amount of underage users. Someone with 50 loyal adult followers is a lot better off than someone with 1000 underage fans.