Getting started with programming a 3rd party NRF52832 MCU

[MikeLemon]

Hello,

I'm here in the processes of migrating from arduino due to lack of proffecionalizm and functionality at least for that nrf52832 mcu now the PCB is already done and tested (with programming it through the arduino IDE) but I'd like to move on with it maybe with eclipse using an STM32 discovery board taking advantage of the UART,I2C,PWM, a function like tone()(from arduino), BLE(between two nrf52832 units), and NFC.

Does anybody maybe has a good guide on how to get started flashing and programming stuff like this thing?(I've set up eclipse for it but I don't know where to get started on how to program it and flash it with eclipse but atleast it can build codes) assuming I'm an expert in arduino but know nothing about pure C++ micro controller programming(all the make files and stuff like that.

BTW already got softdevice S132 on it from arduino what ever that thing is.
Operation system: windows 10
Programmer: ST link V2 donge, STM32 discovery configured as a J link