Its so easy.. putting together the computer. The hard part is figuring out which parts to buy.
But if you go too fast while putting it together and forget to plug up a power connection or something like that, building a computer can be frustrating. Just make sure to check again then double check and take you time.
And for the love of god don't ever think about buying your computer pre-built, its so much more fun building your own computer and you learn alot.
And you save LOADS of money!!!