|Be reasonable in what you expect.|
Plan on purchasing what you can afford.
Intel and AMD CPU cannot run on the same board. If you change over, you purchase a new motherboard, CPU and possibly other components and then you will be an 'Intel Guy' instead of an 'AMD Guy'.
If you plan to do this, you probably should plan on a complete new build in order to do it right and not make unintelligent choices. This way you will have your current computer to use until it is completely ready for use (if you cannot afford everything at once, etc) and you can either keep your 'old' computer for web surfing or sell it for whatever you can get for it.
I do not know for sure, but you are coming across as about a 12year old (+/-). If you are a minor, run your choices by an adult who has some experience building gaming computers so you do not make expensive mistakes. A new build or a major upgrade always requires many more components than first thought (power supply, compatible memory, and more) and don't forget that you will need a new copy of Windows also, once you change the motherboard.
You have to be a little bit crazy to keep you from going insane.