Silva believes City have a lot of work to do in order to progress to the next round when they meet the Germans again for the second leg.
A stellar performance put up by Pep Guardiola’s men at the Puskas Arena in Budapest was rewarded with a comfortable victory against Marco Rose’s men.
Silva met a cross from Joao Cancelo to put City ahead on 29 minutes and the visitors could have been out of sight before the interval if not for their own profligacy.
Gabriel Jesus got the Englishmen’s second goal and that was enough to beat the Bundesliga outfit.
"It was a good game for us, a good win. In this competition you can make a mistake and you're out. We tried to play simple football and not make mistakes,” the Portugal international told BT Sport.
"It's not finished yet but it's a good win.
"Usually I'm not [deadly with his head]. I try to practice a lot. I think I was lucky Joao [Cancelo] gave me a great ball. I'm happy to score and help the team.
"He's an amazing player [Cancelo]. I played with him seven years at Benfica, we're the same generation. We have a good connection. He knows my timing and I know how good he is on these balls.
"We need to keep going because we're only halfway through.
"We have a map, a way of playing. Players get injured or cannot play and our style doesn't change."
