The image itself does not present any significant damage if any at all, so you should be fine just replacing the digitizer.
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From the (veryveryvery quick) research I've done, the LCD and Digitizer are separate and not glued together as in some models, so the digitizer alone can be replaced, it seems.
There are quite a few tutorials on YouTube and Google on how to replace it.
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Let us know of any other questions or issues that might come up.
The image itself does not present any significant damage if any at all, so you should be fine just replacing the digitizer.
There are quite a few tutorials on YouTube and Google on how to replace it.