What is the ruling on interpreting dreams and entering Ibn Sirin's dream interpretation website to learn the meaning of things seen in a dream? Is that considered unlawful (haram), and what is its expiation if it is?

Interpreting dreams is not permissible except for those who possess knowledge of it. It is not valid to interpret them merely by looking into books of interpretation, as dreams vary according to individuals, circumstances, and times. Whoever does so commits a sin. Therefore, it is not permissible for you to interpret dreams based on websites. Rather, you should ask those specialized in it, and you must repent and seek forgiveness for what has passed.