The young Italian striker is expected to push for a first team berth at Fulham next season.
Trotta told fulhamfc.com : "Napoli were disappointed to lose me, and tried to hold me until the end, but I'd made my decision to have a new experience abroad," he says. "A new culture, a new language, a new type of football. I didn't speak a word of English when I arrived - nothing - and made a few mistakes getting by, but it helped me grow.
"It was a big step, leaving my family and coming here alone. But it helped open my mind a bit. There was no point making a tough decision (to give up and go home) after only a few months. I knew there'd be tough times and, for a while, it was difficult.
"But it has been worth it now. I've developed here at Fulham, adding aggression to my game and being more decisive with my movement, always looking to help the team. That's all good stuff to learn. Perhaps concentrating on my football helped me adjust. I had to focus on my game, so I didn't tend to think so much about missing everyone back home."