◎be into に凝っている、熱中している
I'm really into Ireland right now.
I went to drink Irish beer the other day.
I found out that there was a day called Arthur's Day.
It is the 26th of September.
Arthur is a progenitor of GUINNESS beer.
I'd like to know more about the history of Ireland.
I’m also into those kinds of movies.
◎~ということを知った
know は「知っていた」になるので使えない。
find out that がいいようです。
◎progenitor 創始者、先駆者