don't worry about creating long post, a 5 minutes writing is all over the platform for sometimes, as long as it is original works, I don;t think people would mind it. I myself, I like to post at least 200 words and a single picture (related or not, it is mine and all I have) but.. I'd appreciate those who could write 500++ words posting too.

just do what you like to do and have fun on Steemit, people would appreciated your post if they thought it is inspiring and informative or at least Fun To Read. Keep Steeming!