Wales now travel to face Scotland in Murrayfield on 8 March before hosting England in the final match in Cardiff seven days later.
Sherratt will lose his English-based club players next week and knows he will have to battle to maintain the positivity.
“I’d love to have all the players in on a fallow week and we could get some good work done,” he said.
“It is a disadvantage, it’s new to me as the English-based boys go back.
“We can do bits and pieces with the boys that are left.
“What today has done has whet people’s appetites in terms of – can we build on this?
“I’ve been coaching long enough, there’s always going to be a bounce. A fresh voice, a different attack.
“The challenge is building on that bounce over the next couple of games.”
Sherratt says he is not sure whether this weekend will lift the negativity within Welsh rugby, after the Wales Under-20s side defeated Ireland.
“My mindset on these three games is I’m not going to get bogged down by that,” he said.
“I’m not interested in what’s happened in the past.
“I’ve just got to be authentic and coach how I believe the game should be played and make sure I instil some belief in the players.
“Hopefully the effect of that is a positive one on Welsh rugby.”
