You seem focused on what your people DO which is just surface detail. People want to know how your characters
think and most important, how they
feel.
You may need to read or re-read favorite writers to see how they describe how their characters think and feel. Noting that a character is watching TV with his feet up and a beer in hand is one thing. Knowing he's not paying attention to any of it because his best friend just died in a car crash lends a different tone to that picture.
Try acting. To some it comes naturally, others have more of a struggle. Pull on the skin of every character and see everything in the story through his or her eyes. If they ALL react the same way you have more rehearsal to do.
Example: A girl swimming fifty feet from shore is suddenly attacked by a shark.
How might these characters react to the emergency?
A spoiled teen boy from a wealthy house where everything has been done for him;
A wheelchair-bound ex-marine ;
The girl's mother, who has a crippling phobia about water and swimming;
The girl's little brother, who's too small to help.
Get in each skin and imagine what each one is thinking and feeling during that awful moment of realization. Each is going to have a strong internal conflict.
The teen boy is the most logical hero, but doesn't know what to do. The marine knows what to do, but can't. The mother wants to save her child, but can't bring herself to go into the water; the little brother could end up in danger himself when he tries to help.
Suppose the girl is saved? What's the aftermath reaction for each?
Suppose the girl dies? What's the aftermath reaction for each?

Good luck.