Original and effective ppi

Hey everyone! I would like to ask for some urgent help on Indesign + PDF print document subject.
I prepared a document for offset print (business cards 8,5cm width x 5,5cm height) and it turned out that the pictures were very rastered on the Proof. Like, you could see the raster dots on it.
I checked out my Indesign document again and I found out that the original ppi of the images was 762 and the effective ppi over 1000. I then realised that on Photoshop, I setted by mistake the pictures´s resolution for 300 pixel per cm instead of pixel per inchs!!
I changed that and they have now:
300 pixel per inch resolution
4cm width x 5cm height
and the pixel dimensions are: 472 px width x 591 pixel (height).
In the Indesign document, it appears now:
300 original ppi
between 300 and 400 effective ppi
472 px x 591 px dimensions
My question is, do you guys think I solved the problem that way or should I still change something before I sent it again to print?
The real dimensions of the pictures on the business card should be about 4cm width x 5cm height, so I decided to have them on Photoshop with that dimensions and 300 pixel per inch resolution, so that I don´t have to scale them much on Indesign. Did I do it right?
Thank you!

The original psd file has, more precisely:
Image size: 14,8 cm width x 21 cm height
Resolution: 762 px / inch ( = 300px/cm )
Pixel dimensions: 4440 x 6300
Then, I changed the Resolution from 762 px / inch to 300 px / inch, and checked in the "resample image" option, which converted the Pixel dimensions into: 1748 x 1418
(Image size remained the same)
This file has good detail quality, it looks sharp.
Then, I drag the layer from this file to a new one, with the image size I need :
Image size: 4cm x 5cm
Resolution: 300 px / inch
Pixel dimensions: 472 x 591
Which makes me think of another question: Are these Pixel dimensions enough for print? Is this psd file good enough to place in Indesign and for print?

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Original and effective ppi

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