Colors are off, what should I do?

Image Editing Help
1

I’m scanning a roll for my friend using NLP 3.0.2.
I use DSLR scanning: Sony a7m3 with sigma 70mm macro, light source is homeamde light pad (6500k, RA 98+),

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2

The negative scann is like this, added some border to show that it is very overexposed.

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3

Do you have the RAW file? At first glance nothing looks outwardly wrong with the image, other than the drying streaks and water spots on the film.

4

The capture looks really dark and I suppose that the histogram looks left-centered too.

Try to rescan the film and follow Nate’s hints. Film Scanning Best Practices | Negative Lab Pro