Making edits to existing chapters

I’m currently working on a long fic (15 chapters and 80k ish words). But looking back on earlier chapters, there are definitely improvements I’d like to make - especially to Chapter 1, which I rushed to post.

Would it be possible for me to use the edit chapter function, then delete the contents and then paste the new/ updated version in its place ?

To be clear, it’s nothing that would change the plot of the story or anything major. It would just make it easier to read and improve the cohesiveness of the narrative, now that I know my characters voice better. I would add an authors note explaining.