The Italy striker joined Lazio in January on-loan from Atalanta.
He told DAZN: "I'm happy with everything. The goal, the performance, the win. We needed these three points and we're happy. There's a lot of talk about my role, but I'm happy, even though I have to learn different moves that I've never used before. We have a great team, and I've made myself available.
"I've always played on the left and less with my back to goal, but things are going well. (Maurizio) Sarri instills confidence in me; from the first day I arrived, he made me feel at ease and gave me the freedom to roam all over the attacking front, attacking the goal.
"The national team? I'm thinking about it; it would be a dream to make the playoffs and help the Azzurri secure qualification for the World Cup."