"I'm delighted for everybody. We worked hard and it was a good victory," Zola told Sky Sports News.
"A draw would have been a fair result. We didn't play as well in the second half as the first, but we got the two goals that made the difference.
"The type of football we need to play is expansive so the players need to be in top condition. Give me time. I'm learning a lot from my players and learning a lot from this division."
Watford host Ipswich Town at Vicarage Road on Tuesday evening.