I'm a novice too. Here is what I have found:
1) I am getting started and find it hard, but I think that has more to do with me.
2) I've decided on VS Code with the nRF Connect for Visual Studio add-in and I'm starting with the PineTime_DevKit0 board
3) Most examples are c/c++ that I've seen
4) Zephyr as it's nRF52, lvgl seem ubiquitous, ble
I've been using ST-Link v2 and OpenOCD to flash the PineTime Dev Kit. Segger J-Link seems optimal and integrates with VS Code, but it's expensive and you need an adapter for 5v to 3.3v. There is a jlink onboard the nRF52 DK, but it has license restrictions and I never got it running right (powering the board was my problem).
If you want to extend existing work, InfiniTime is probably your best bet and that is FreeRTOS
1) I am getting started and find it hard, but I think that has more to do with me.
2) I've decided on VS Code with the nRF Connect for Visual Studio add-in and I'm starting with the PineTime_DevKit0 board
3) Most examples are c/c++ that I've seen
4) Zephyr as it's nRF52, lvgl seem ubiquitous, ble
I've been using ST-Link v2 and OpenOCD to flash the PineTime Dev Kit. Segger J-Link seems optimal and integrates with VS Code, but it's expensive and you need an adapter for 5v to 3.3v. There is a jlink onboard the nRF52 DK, but it has license restrictions and I never got it running right (powering the board was my problem).
If you want to extend existing work, InfiniTime is probably your best bet and that is FreeRTOS