Disasi recognises Goodison Park will be hostile.
"It will be my first time at this stadium, and when I speak to the guys they all say it's a tough atmosphere there," he told the club's website.
"They beat Newcastle so they will be with a lot of confidence. We want to show we can win games like this, tough games. The two last away games we have lost, so we need to win this game. "We have to be more aggressive all over the pitch, and show we are growing day by day.
"We have to build our confidence. We haven't succeeded in winning two or three games in a row. When we do this it will bring us confidence. We have to stay positive and stay focused on the work we do."
He added: "I'm happy to be here, it was something I wanted. Every day I learn. The championship here is very good because you have a lot of spectators. The fans are very good. They live the game and to feel it on the pitch is very good."