"It's obviously nice for me because you want to start well, get a win and get a goal. Performance wise, I think whenever I make a debut I sometimes get too apprehensive," said the Wales striker.
"Some of my touches went astray, but the goal settled me down, and now hopefully there's a lot more to come from me.
"Maybe I was apprehensive because I've been through this third qualifier before and been out at this stage.
"I'll tell you, it's amazing how much a season can go off if you don't get through this.
"When I lost to Partizan Belgrade at Newcastle it had a knock-on effect for the first few months of that season.
"It was a real struggle, because everything you've been looking forward to with regards to the Champions League is suddenly taken away from you.
"No disrespect to the UEFA Cup, but it's nowhere near the same tournament. We've just get to get these two games over and done with and get through. It's vital.
"We knew they'd be tricky because we'd watched the DVDs. It's tough when you go up against a side you don't really know much about.
"It will be a different game in the second leg. They have to come out now, and that's why it was so vital for us to get that second goal.
"They had everyone behind the ball last night which made it frustrating, but now they've got to try and have a go at us."