よいのかわからない

don't know what I should do

→ 良い
phrase Rare #37,571
don't know what I should do Used to say that you do not know the right or best course of action. It often follows a question word and a verb, as in 何をすればよいのかわからない (I don't know what I should do).
JA: この問題を誰に相談すればよいのかわからない。
EN: I don't know who I should consult about this problem.

どこへ行ったらよいのかわからない

I don't know where I should go.

何をすればよいのかわからない

I don't know what I should do.

どの程度まで彼らを信じてよいのかわからない

I don't know how much I can trust them.