The Sauber Academy member is set to finish second in the F2 standings behind champion Felipe Drugovich, with the season finale taking place this weekend in Abu Dhabi.
There had been rumours that Pourchaire could be in line for an F1 seat with Alfa Romeo had he won the title, though those hopes were dashed at Monza with Drugovich clinching the crown.
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Pourchaire says though he is unsure what his plans are for next year, he is “ready to work on myself” and hopes for an F1 seat in 2024.
He told Autosport: “To be honest, even if I'd won the championship, I’m pretty sure I wouldn't be in F1 in 2023.
“Because of many things, and that's the sport nowadays, it's like this, it's built like this. So I'm okay with that.
“I understand that I'm still young, and I'm ready to work on myself and to build myself to be ready to grab a seat in 2024. My dream is to be a Formula 1 driver, Formula 1 world champion.
“The rest, I'm not really interested in doing, I'm not really interested in being a GT driver, Formula E driver or other things.
“I mean, if I cannot get to F1, maybe I will drive those cars, those championships, but my dream at the moment is to be in F1, that's it.”
Pourchaire made his F1 weekend debut at the US Grand Prix last month, taking part in FP1 with Alfa Romeo.
He completed 19 laps of the Circuit of the Americas in the C42, replacing Valtteri Bottas, and finished the session 18th ahead of Williams F1 prospect Logan Sargeant and Haas stand-in Antonio Giovinazzi.
Pourchaire will continue his work as reserve driver next year, and is set to move closer to the team’s headquarters in Switzerland.
He said: “The FP1 outing was amazing, it's unbelievable. F1 cars are really fast. Being on the Formula 1 weekend with all the other drivers on the track, it feels amazing.
“That track is amazing, Austin is unbelievable, I love this track now. I only did 15 laps on it, but I would love to drive again there.
“It was very good for me, because I will do a lot of simulator work with Sauber next year, with Alfa Romeo, so it's important to know how the car behaves in reality, how it works in reality, so I can correlate a lot on the simulator, which is good to help the team because there is a good gain of performance there.
“The team is already in good shape, we did some good upgrades on the car, so next year can be a really good year for the team.
“So let's see, we will work hard, and I will move there to Zurich, next to Hinwil, where Sauber is based and I will work with them.”
The 19-year-old is not yet sure of his racing schedule for next year, but said a third F2 season is “an option, clearly.”
Current champion Drugovich won the title on his third attempt, while Nyck de Vries, who joins AlphaTauri in F1 next year, did the same.
“We were talking about this with the Sauber Academy a few days ago,” he said.
“It's an option because Formula 2 is, in my opinion, the best championship after Formula 1.
“We are on the same weekends as the Formula 1 teams, we are watched by every Formula 1 team.
“I am still very young. I am capable of winning this championship for sure, at least I will give my best if I do this for another year, I don't know yet.’
He added: “Let's see how it goes in the talks for my future. But if I have a good contract, a good option, why not do a third season in F2?”
