First Gun (Budget)

I am looking to get my first AR and from my understanding, getting the parts is a lot cheaper than buying a prebuilt AR. Due to Washington sucking, it would be simpler for me to get an AR pistol but maybe I should just switch my residency to Colorado and try it here. Regardless, my budget is about $700 (though cheaper would be better) and Id love some recommendations on parts. What I have mainly been browsing has been PSA which has good stuff but theres so many options and somehow they all have good reviews? So Im a little lost. I at least know I want 556/223.