im going to quickly point out short sentences are ok, but only when in a good place for effect.
I opened my eyes slowly as I began to wake up, dazed from perhaps weeks of slumber. My head was in agony. As I reached up my hand to hold it, I realized that I couldn't move, my arms and legs strapped down tightly with hard leather. Breathing was painful, my chest set alight underneath my shirt. I lifted my head and glanced around at the room that I was in, and found I was lying on a table, with a bright light shining above me. Looking at the dark floors, a silhouette dripping with sweat looked back.
i guess the main thing is to read it aloud and see if you like it
(just know im not some kind of expert writer that plays blockland in his spare time, this is just my opinion.)