You are greatly overestimating my skills. I just about know the difference between a flat head and a phillips screwdriver.
I have had a look at the youtube videos detailing how to chase in wires. It seems waaay to complicated. I'd rather pay someone to so it properly than spend time trying to do it myself, failing miserably and then paying someone to fix it.
It's virtually impossible to mess it up, if you make a mistake it will get hidden by the replaster.
Shading for wires is essential making 2 lines and chiseling out the middle to a certain depth, it doesn't have to be perfect as it gets covered with plaster anyway.
But let's start simple.
What is the first task you wish to tackle on your own?