I am studying in Eretz Yisrael for the year. what is the halacha regarding me keeping 1 day of yom tov or 2 days?

There are many opinions on this question; you should ask your rabbi or the rabbi of the institution you are learning at. Generally it is accepted that if you intend to return to Chutz Laaretz, you should keep two days like you would in Chutz Laaretz.