我才知道

I only just found out

→ 我
phrase Rare #15,400
I only just found out 才 emphasizes that the speaker learned something later than expected or only at that point.
CH: 今天我才知道他已经搬走了。
EN: I only just found out today that he had moved away.

老实说,到现在我才知道原因

To be honest, I only found out the reason just now.

— 梦幻之地 (1989)

直到今早我才知道了真相。

I didn't learn the truth until this morning.

我才知道这是假药

I just found out this is fake medicine.

— Dying to Survive (2018)

但他不知道的,意外发生后…我才知道的

But what he didn’t know was that I didn’t find out until after the accident…

— 蓝白红三部曲之蓝 (1993)

直到现在我才知道我有个女儿

I didn't find out I had a daughter until now.

— 莫斯科不相信眼泪 (1980)