I'm not to sure if you know or not so i'll say it anyway. What you have in the combo deal is not nearly enough to build a complete computer. It would help is you grabbed a graphics card. Ive seen a big difference with editing with and without one.
And your still going to need like a hard drive and maybe a disk drive if you want one.
And get intel.
Good luck tho. Building my computer was THE most satisfying thing ive done and was incredibly fun.