The word for here would not be redundant. The phrase "to see for myself" means to see with your own eyes rather that take someone else's word for it.
For example "My friend told me that the tree had blown over in the wind. I didn't believe her so I went to see for myself."
If you were to remove the word for it would change the meaning to literally mean that you went there in order to look at yourself (i.e. your own body)
Hope that helps
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