The 20-year-old midfielder signed from Internacional for £20 million this summer and impressed during Brazil's Olympic campaign at London 2012.
And, despite the challenge of adapting to a new country and style of football, Oscar has backed himself to earn a starting berth soon enough.
|15/8||Oscar is 15/8 with William Hill to score anytime in Chelsea v Reading
"It was like that at Internacional and it will be the same at Chelsea. It won't take long, in a month I will have adapted and I will be in the first team."
The Brazilian made his English top-flight debut during the west London side's opening league fixture, coming on as a substitute in a 2-0 victory over Wigan on Sunday.
Having joined Roberto Di Matteo's team along with fellow attacking talents Marko Marin and Eden Hazard, Oscar acknowledged that he faces a tough battle to break through.
"I'm in good form, I'm doing well which can be seen in training. It was a good performance against Wigan even though I only came on in the second half and played the last 30 minutes," he added.
"Of course there is strong competition for places, but I have confidence in my football ability."