Its not hard though? If people can build Lego as a kid, i am sure they could put a pc together. All you need is the very basics of the hardware. What is what, what goes where, could easily do that in 15 minutes explaining to someone. Making it look nice and installing the os etc is what takes time
If you were blessed with the ability to fuse computer parts and bring them to life in a coccophany of buzzing electricity and whirling wind the ability will come to you naturally. Do not pollute your mind with books or videos of the un-learned.