のは初めてです

it's the first time …

→ の
phrase Rare #28,868
it's the first time … Follows an action or event to say that it is happening for the first time. In questions, it means “is this your first time …?”
JA: 海外で一人で旅行するのは初めてです。
EN: It's my first time traveling abroad alone.

聖書を読むのは初めてです。

This is my first time reading the Bible.

この症状が出たのは初めてですか。

Is this the first time you've experienced these symptoms?

アラブ語で書いたのは初めてです。

This is my first time writing in Arabic.

韓国に来るのは初めてですか?

Is this your first time in Korea?

この町へ来たのは初めてですか。

Is this your first time coming to this town?

日本に来たのは初めてですか。

Is this your first time in Japan?

「見るのは初めてです」

This is my first time seeing it.