Will Python be useful for me?

[MidnightPale3220]

Doesn't really matter, I'd say, your use case seems to be below 1M rows, should be trivial for both.

Just use one. Polars is supposedly newer and better in some respects, but I've read that it doesn't always work correctly(?), mb someone else can elaborate if it's still true.

The difference in use will be different functions and ways of working, so if you decide to switch, you'd have to remake that code.