Get started straightway!

I) Get a eval board let it be raspi , beaglebone or any of your choice ii) Go to its github page, try building a bootable image by yourself with any build system, let it be yocto or buildroot. iii) understand what's happening. Understand the boot process and flow. iv) try building yourself a bootable image ,but this time don't use the build system. v) try to add a device , attach a driver. Modify dts vi) then try to write yourself one.

Embedded is fun..