Everton twice took the lead in the match through two goals from Brazilian winger Richarlison but Wolves refused to go down without a fight and came back to equalise each time, with Ruben Neves and loanee striker Raul Jimenez scoring for the home side.
"We have character because we came back from a goal down twice, which is not easy," Santo told BBC Sport (via Sports Mole).
"Today taught me that we can react to goals but we have a lot to improve. We have always known we have quality but we are in a growing process. It was the first time for a lot of us in the Premier League but we will get better and better.
"It was a good atmosphere and the momentum must go on, everybody has to believe. We can only control our own expectations and the fans must enjoy.
"It was a team effort. Raul [Jimenez] scored the equaliser but I think the reaction from the team and the desire was always us - that requires energy and character. Everton reduced the space and they do not concede too many situations, but now it is our job to find solutions."
Wolves' next fixture is against Leicester City at the King Power Stadium next Saturday, with the Foxes still looking for their first points of the campaign after losing 2-1 to Manchester United in their opening fixture.