Help Writing a Musical Drama Screenplay

Hello! I am currently in the middle of trying to write my next feature length screenplay, a musical drama. However, I am struggling to hit my stride with it due to confidence in my writing ability, and believe having a fresh perspective to work with would help with confidence and also elevate the material. In particular, I'm looking for help with: • Two big sequences in the story I have mapped out, but am really unsure of how to stage them beat by beat in screenplay form. • Adding personality to the action lines. For this particular story, I want the script to really leap off the page, and what I've written so far isn't. • Character and dialogue is something I continue to struggle with, and at the center of this story are three very distinct, opposing characters. So help figuring out the language for each one to make the conversations memorable would be a huge help. I have the story in place, now I'm looking for help bringing it to life on the page as best I can!