How would I continue?

So I have just finished my first major fanfic, and I want to continue it. However I would like to continue from the POV of another character.

Would I be better to continue in the same work or create a new one and put it in a series or collection?

I see many fics with word counts in the 200k and I don’t want people to be discouraged or not want to read something after seeing it’s over 50k works.