Sergio Perez concedes it will be "difficult" securing a 2014 race seat as he was not expecting to be let go.
In the midst of rumours that Kevin Magnussen is set to take his McLaren drive, Perez confirmed on Wednesday night that he would be leaving the team after just one season.
However, with the grid filling up fast, Perez and McLaren may have left it too late for the Mexican to find a place on next year's grid.
"We're looking at that," said the 23-year-old.
"It's a difficult situation right now because the decision was taken late, but I'm confident I'll do the best for my career.
"But I will not be in Formula One just to be in Formula One. I will find the right option for my career, with the aim to find a good team to give me the opportunity to win races."
For now, though, the former Sauber driver is still trying to absorb the news, revealing that he is in the dark as to why McLaren opted not to retain him.
"It (McLaren's decision) wasn't what I was expecting," he added.
"But this is life, and sometimes life doesn't go the way you want it to go - and this is a perfect example - so you have to take another route.
"I'm still young, I still have a lot to give to the sport, and I have my whole career in front of me.
"I just have to take another route now to keep aiming for my goals in Formula One to become a World Champion."
Perez, who claimed three podium results during his last year with Sauber but none in his only season with McLaren, is adamant that both parties gave their all despite the lack of results.
"It's been disappointing on both sides, for McLaren and for myself. I was not expecting it to be so difficult," he told PA Sport.
"If I look back I did my best and got the most out of the chance I had.
"The team has been under so much pressure. We are McLaren and we have one of the biggest budgets, and with the season we've had, you can imagine the amount of pressure.
"There was pressure on me, on Jenson (Button), on Martin (Whitmarsh, team principal), on everyone, the whole team, so the most important thing was for everyone to be together.
"We did pretty well. It's what makes me feel proud of them, that we all stuck together, which was very important and crucial for such a difficult year."