The Blues opened their 2013/14 UEFA Champions League campaign with a 2-1 reverse against the Swiss side at Stamford Bridge.
That setback brought to an end a 13-match unbeaten run at home in continental competition and offered a rude awakening to returning coach Jose Mourinho.
With Chelsea having crashed out at the group stage in 2012/13 - as defending champions - a second successive flop was feared.
The Premier League outfit have responded in style, though, breezing past Steaua Bucharest 4-0 before claiming an impressive 3-0 victory over Schalke on Tuesday.
After netting twice in that contest, Torres said: "We are top of the group again after not the best start of the competition at home against Basel.
"Now we have two games at home, one game away, so we're in the position we wanted.
"These kind of things (defeat to Basel) are good when it happens at the beginning of the season, when the games are not crucial and we have time to fix it, like we have done now.
"When these kind of things happen at the end of the season, you lose competitions, you lose titles and it's not good. Hopefully we've learnt the lesson and it won't happen again.
"This is a young squad. New manager, new style, new players. It's not easy to settle quickly.
"We are on the way. We're improving, we're building up, we're learning as a group."
Chelsea's fate is now back in their own hands, as they top Group E, and Torres says they will be going all out to replicate their heroics from 2012 - when they landed European football's biggest prize for the first time in their history.
The Spain international added: "The Champions League is what Chelsea has to play; Europa League is not a competition we want to win.
"We're in the Champions League now, we don't want to be involved in the Europa League again because we want to win the Champions League.
"First step is finish top of the group, or second, and after that we'll see. It depends on the opponents.
"Sometimes the Champions League depends as well on the draw. Sometimes you have an easy way until the semi-final or final; sometimes you have to beat the best teams and you cannot. Let's go step by step. Schalke at home and we'll see later."