Which Microcontroller should I use for my project?

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Hi,
I'm fairly new to microcontrollers and have read multiple guides, although still asking the question.
I have used Arduino for quite a long time and have developed some product concept. I am only 14 years old though.
I am currently developing a wearable project, therefore size, weight, and battery are huge constraints.
My project will include; Touch OLED, Gyro, IR LED and receiver.
As I have used Arduino, I am quite familiar with the Arduino offset of C++.
It will be appreciated if the MCU has example codes/ others have used similar components.
Could you please help me on both; hardware and software.

Thankyou in advance.

 

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there are different type's of microcontrolers and compiler's. you can use 8051 microcontroller with keil compiler. and flesh magic software to programmed your microcontroller (8051)