Romain Grosjean has explained that the mistakes he made during the 2012 F1 season stemmed from wanting to win races on his return to the top flight.

Having battled his way back from the disastrous part season he endured with the Renault team in 2009, the Frenchman returned to a plum ride with the renamed Lotus squad, but the potential it showed only helped fuel the desire he had to stand on the top step of the podium.

"I wanted to get that first win at all costs and I made beginner's mistakes by wanting to go too fast at times," he conceded to France's Sport24 website, "These are things that I will not repeat.

"It was my first full year and, if someone had told me that I'd finish eighth in the standings, with three podiums, I would have signed immediately. There are some very good [memories], some very bad, but I'm trying to keep positive."

Surprisingly, the Belgian Grand Prix pile-up at La Source is not the biggest regret of Grosjean's season, the French youngster preferring to single out an error he made after being made to sit out the ensuing Italian round.

"Honestly, I think the Japanese Grand Prix [is the worst memory]," he insisted, "For me, this was my biggest mistake at the start. This is 100 per cent my fault and I accept it completely. This is a lesson for the rest of my career.

On the positive side, there were many times that Grosjean says he will recall with pleasure.

"It was a long season, with 20 grands prix, but inevitably I remember my first podium in Bahrain and the second place in Canada, but also qualifying in Melbourne, when my engineer told me that I was third on the grid," he smiled, "These are times deeper than I remember."

Admitting that the year was harder than even he could have imagined, the 2011 GP2 Series champion can point to several areas in which he has made progress over the season.

"Frankly, in many areas," he admitted, "In the mind, the management of the season, fatigue, the settings of the car. I had to adapt to many things.

"Obviously, I hope I have grown up, but I do not want to stop there. I want to continue the analysis during the winter and come back on a sound footing. The return to training is scheduled for 30 December because we are testing in February already."

Grosjean's problems during the season were thought to have been a major factor in Lotus taking its time to reconfirm him alongside Kimi Raikkonen for a second term. Unsurprisingly, with his F1 future hanging in the balance once again, the Frenchman didn't find it easy.

"It was a difficult period," he admitted, "Frankly, I'm relieved [to have re-signed] because the last weeks have not been easy to manage. I really wanted to continue the adventure. When I heard the news, it was a great joy.

"There will be a different pressure [net season]. I am no longer a beginner and making the same mistakes will not be possible. In karting or cars, we have a year to learn and a year to win, but F1 is a bit different because it depends on many things. [For next season], for me and for the team, I want to do the best possible performance, giving the maximum. I hope the car will be good, but we must wait for the first qualifying of the year to find out."

Grosjean insists that he has not set his sights on a particular championship position for 2013, instead preferring to focus on his performance.

"I want to score points consistently, have the speed that I had this season and be consistent in the effort," he concluded, "After that, I'm not setting objectives in terms of ranking. It would be a mistake...."