Again, this is only normal. I had such existential questions after watching the Matrix movie like 20 years back. I was like "Morpheous will ask Neo "What's real ?" and his reasonings were good.
But, such philosophical and existential quest has been in the Indian tradition for centuries. Simply put, 'This whole world is a myth' is one of the schools of Indian philosophy. Guess, you're only introduced to it now.

**My question is**
What is the meaning according to this sentence? (Guess, you're only introduced to it now")

Everyone already knows about this topic except you. You are the only person introduced now.

you’re only now being introduced to this topic.

Here "only" mean
Person
Or time

Question

Again, this is only normal. I had such existential questions after watching the Matrix movie like 20 years back. I was like "Morpheous will ask Neo "What's real ?" and his reasonings were good.
But, such philosophical and existential quest has been in the Indian tradition for centuries. Simply put, 'This whole world is a myth' is one of the schools of Indian philosophy. Guess, you're only introduced to it now. 
 
**My question is**
What is the meaning according to this sentence?  (Guess, you're only introduced to it now")

Everyone already knows about this topic except you. You are the only person introduced now.

you’re only now being introduced to this topic.

Here "only" mean
Person
Or time

Answer

Time.

It's not a very native-sounding sentence but the meaning can be understood fully. More native ways to say it: 
It seems you're only now hearing about it.
It seems you're only now learning about it.
It seems you're only now being introduced to it.

You can see in the more native sentences that "only" is related to time (now).

Answer

Hello, thanks for approaching me with your question.
Well, the word "only" does not imply a "person" it actually implies "time".

According to me, the phrase could said as  "I think it's  now you are getting this information for your first time."

The word "only" is to make a precision that it is the "first time" he is getting the information.