As long as you don’t change fuse bits as you flash the pre-compiled Hex files available from TK you only risk having a light that doesn’t work cause the FW doesn’t match the HW, not cause it’s actually bricked. Easily fixed by flashing the correct file…
The risk of bricking it comes in when you start changing fuse bits for no reason and making your own builds.

Grab TK’s latest build, flash it (that’ll be a task in and of itself; getting avrdude setup and connecting programmer->driver) and get that part down then start on the atmel studio side of things [first] building unmodified code amd [only then] modding code yourself.

The steepest learning curve for me was by far the atmel studio side of things. Getting the HW working (Usbasp) isn’t plug and play but zidag (a driver installer) got me going without too much BS.