Hi,
Unfortunately we don’t have any specific tutorial for STM32 IAP, so we would recommend checking the STM32 documentation for an example of the memory offsets compatible with the bootloader. If you know the memory offsets, normally applying them should be as easy as just editing the linker script. If this doesn’t work, let us know the memory layout you are trying to get, your current linker script and the behavior you observe and we will help you get it to work.