
,its a very young age to get involved with this sort of stuff can't your dad help?
when you are checking things on a temporary measure then you need not worry about the earth and the added fuse protection as once you prove the fan works then there is no need to keep the wiring/setup the same
if you want to proceed with this cab then,in my opinion,the fan is the least of your worries and for me it would have one of the last things to fit
if i could give you some advice then read as many threads on mame,monitors etc,etc-make a plan of exactly what you want your machine to do and don't be afraid of set backs-to be honest the only thing that is bit scary is the monitor situation,but you should deal with that when you get to it and with the fantastic advice on offer here on this brilliant forum you should be able to confront and overcome all the future problems