Baseballbomber1 :
Is there a place where I can tell them the parts I want and them put it together and send it
Yes, there are several services that might be for you, but you will not always get full design input, e.g, you may not get to fully pick your own motherboard, graphics, sound, etc. Chances are, they will give you several pre-made setups to choose from. Bear in mind, these are still good computers, and will perform to your standards, they are just already planned out for you, seeing as you may not have enough experience in computers to buy and completely assemble your own.
These computers also come with your OS (usually Windows 7) as well as reasonable quality peripherals (stuff other than the main computer) like your mouse and speakers. Its up to you, however, to purchase monitors and any other necessary equipment, like headphones, recording cards, etc. These computers will run you about $1000, give or take some.
I hope this helped, as I was also once in your position (and sometimes still am).
Regards,
Nordian