Wasps racked up 14 tries in their opening fixture and Young admits it was the perfect beginning to his second continental competition at the helm.
"I couldn't have asked for any more from the boys. They totally dominated from start to finish," said Young.
"Our set piece was very good, we had bite in our defence and we looked fluid in attack. Some of our passing was excellent and those passes that haven't been sticking for us the last few weeks started to do so really well.
"We have a small squad so it was great to have a chance to give guys game time and many guys a debut. We need to do that when we can.
"Viadana were a very committed team and they didn't give up but we were too strong all over. We didn't expect the scoreline but we are delighted with that effort."
Wasps, who won the Amlin Challenge Cup in 2003 and the Heineken Cup in 2004 and 2007, now host fellow Pool 4 victors Bayonne at Adams Park on Thursday.
And Young knows that the manner of their first success will give his side the benefit of belief ahead of the next instalment of continental action, although he insists he expects a huge step up in intensity from their Round 2 opponents.
"This win will give the boys plenty of confidence and, in many ways, it was just what we needed. There were some excellent individual performances but this was all about us achieving as a team and getting that confidence into our attacking game," added Young.
"We now have a very short turnaround as we play on Thursday night. Bayonne have gotten off to a good start with a bonus point win (over Grenoble) and I am sure they will come to Adams Park targeting that win that would put them in the driving seat in the pool at this early stage.
"That game is going to be a big step up from this weekend and they have some excellent players. They aren't firing just yet in France, but that is a very tough league. We expect a huge challenge."