Welcome on board.
I wasn’t sure either if all the promises Steemit is making are real or not. But by the look of it, there are great potentials but there are also issues and challenges to face, it is still the beginning.

To avoid disappointment, just write away about stuffs that make you happy. If you don’t have much time, focus on quality, in depth posts rather than on quantity. Most importantly, interact with others.

I hope you will enjoy it, learn from it and $$ are just a bonus.

Writing too much is a good thing on Steemit, as long as the writing is of quality: in depth stuffs, easy reading, funny, make you think etc... which seems to be your skills so should be good