If you're struggling to figure out where your plot goes further down the line I recommend figuring out the core message or tagline that describes your story at the most basic level and crafting the plot around it. Like for the film Toy Story it would be something like 'a toy learning to accept change', and for Beauty and The Beast something like 'two people learning to empathize with each other', that kind of thing. Knowing what is supposed to happen at the end can be as vague as 'main character lets go of the past' or 'main character finally finds that they were looking for', but so long as you generally know what kind of person or situation you need to end up with you can figure out what basic things need to happen to get there.
For example, in Toy Story, in order for us to actually recognize that Woody has changed as a character he needed to go through a 'rock bottom' moment (Sid's house) and the 'oh shit, I'm to blame' moment to follow after (Buzz is depressed, Woody restores his confidence, etc).
Whatever your plot is and whatever your character arcs contain, its up to you to construct the landmarks that show the reader what stage of the journey they have reached. Like we know that Woody knocking Buzz out the window was his character at his worst, we know that Woody reigniting Buzz in Sid's bedroom was his character turning around, and the moment the he trusts Buzz to get him back to Andy as they fly towards the moving van is the moment the arc is complete. If you can identify the landmarks your characters need to reach on their journey (major plot points) you can angle all the minor details in that direction, guiding them towards those moments.
Anyway, that's my two cents. Hope it helps!
Edit:
Woody reigniting Buzz in Sid's bedroom
Just realized how kinky that sounds, helloooo. What version of Toy Story is this??