I've come to notice I have a very specific manner of writing. Specifically, I've noticed that while I'm writing a book, I tend to pace and set up things more like I'm writing a screenplay than a novel. The way I've often described it to myself is it's like I'm watching an episode of a television show or movie and I'm frantically struggling to write down what is going on as the scene happens in real-time.
This causes problems for me. I can picture what is going on very vividly in my head, but when I try to put it into words I kind of flounder. I can put in screenplay-esque descriptions of "character X gets up from their seat and does this", but when it comes to putting it into less dry terms to make it prose instead of stage directions I draw a complete blank. I also have an issue where I have things going on in very visual terms that make sense in a visual medium, but don't work as well when translated to the written word. For example, I have a character that's described as very large because they are supposed to visually take up a lot of space to look imposing due to their plot role as The Big Guy, but my beta readers have told me it comes off like I am fat-shaming them. However, I am good at taking advantage of internal monologues and thought processes that written fiction excels at but visual fiction like movies do not.
However, I am writing a written story, not a screenplay, and my tendency to write like a screenplay has basically given me writer's block because I can't figure out how to translate what I am thinking onto the page for someone else to read, at least outside of very rough scene-setting notes describing what is happening like it is a script fanfiction (which is obviously not a good look for a written story). As as result, I am wondering how can I write less like a screenplay, and more like a novel?
I've seen other people on other sites say they've had similar problems, but I've never seen anyone discus how they solved it. The best I can think of is try to take those "stage guides" and flesh them out line-by-line until they resemble prose, but it just doesn't seem to click easily.