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A word to describe our inability to see beyond ourselves, something to do with our innocence that doesn't allow us to see it.

Here is what I am writing:

You may have of heard of the saying, “I guess that’s when the reality really hit me.”, but you never truly understand this until you come to say it for yourself. We have come so far into our complacency in this society as to believe that we live in a “colorblind” society. I take this back to our ____ minds...

Innocence is a concept often accociated to children:

Innocent​:

• having no knowledge of the unpleasant and evil things in life.

• I take this back to our innocent minds.

also:

Ingenuous or candid, sencere:

• free from reserve, restraint, or dissimulation.

Dictionary.com

You should consider naive which implies innocent but more importantly also lacking in experience or knowledge (to go with the context of “I guess that’s when the reality really hit me.”)

I take this back to our naive minds...

M-W:

naive
adjective

Simple Definition

: having or showing a lack of experience or
knowledge : innocent or simple

Full Definition:
2
a : deficient in worldly wisdom or informed judgment

a naive belief that all people are good

I was young and naive at the
time, and I didn't think anything bad could happen to me.

It wouldn't entirely fit your example sentence,and it isn't a single word but the term Infant Solipsism seems to cover the concept you describe.

Infant solipsism

Some developmental psychologists believe that infants are solipsist, and that eventually children infer that others have experiences much like theirs and reject solipsism (see Infant cognitive development).

'Oblivious' would be the right word. It means not conscious of something, especially what is happening around you.

But the word 'carefree' can also be used to project a more positive meaning.

carefree;insouciant;happy go lucky.
She remembered carefree summers at the beach.
with insouciant, the definition goes like pretty much these other words.
A happy-go-lucky girl. Licensed from iStockPhoto. adjective. The definitionof happy-go-lucky is someone who is generally easygoing and carefree. An easygoing kid who takes things as they come is an example of someone who would be described as happy-go-lucky.