Tottenham winger Bale was man of the match after scoring one and setting up the other goal for Sam Vokes to inspire Wales to a morale-boosting victory.
Bale was happy with the success and thinks Wales can take a lot of positives from it ahead of next month's trip to Hampden Park.
"We know it's a friendly match but we want to take it serious," Bale told Sky Sports 2. "We spoke about it before the game, yes it's important to get victories at home and I think it will give us a lot more confidence going into the qualifiers."
Bale played the first hour of the game before being replaced and the Spurs man was happy with his performance.
He added: "It was good to get out [and play], it's midweek so obviously it is difficult with weekend games coming up, but it was great to get out there, great to get a goal especially a win for the whole nation.
"I think you can't really rely on one goal these days so obviously it was great to get the second goal and the lads have done well to see it out at the end."
Bale believes things are beginning to click for Wales under Chris Coleman after a difficult start to his tenure as manager.
"I think obviously there's a lot more confidence in the team now, I think the first win against Scotland in the last qualifier was very important to give us a lot more confidence moving forward and I think the lads are showing it now on the pitch," continued Bale.
Despite a poor start to their World Cup qualifying campaign, Bale has vowed to fight until the end, starting with the next qualifier against Scotland.
He concluded: "We know it is a massive game [against Scotland], we obviously haven't had the start we wanted but we're going to fight all the way and hopefully we can get some more victories."