So I know that for most people here, the answer will be "It isn't" but for a complete noob who barely touches the insides of a pc how hard is it to get right? The guy that I usually get to build my pc's is quite ill at the moment and I do really need a new one, so my options are to buy one from a site or build one myself and I feel like building one myself is probably going to be cheaper but riskier.