Okay here is what I have decided after doing extensive reading and video watching.
I am going to first build an AR15 .223. I think since this is all mil spec it would be best for me to start here and wha the hell who could use two AR's anyway, right <lmao>
So I have actually order a lower and a lower parts kit. I will start there and see how things go. But I will definitely be building me a .308 AR if all goes well with the .223.
The only thing throwing me at the moment is this damn headspace thing. Wow what a controversy! Seriously, some people say it don't matter, some say it does, some say you can fix incorrect headspace, some say you can't. It's almost as bad as abortion and gay marriage arguments, sheesh!