I was going to pay someone to do this but I'm sure he would charge me a lot of money and also he says he's coming and never shows so I've decided to do it myself.
I bought a framing nailer, a concrete gun, a level and the wood I bought yesterday. It seems easy enough, but I don't even know how to use the level.
Actually Amazon is delivering that today. I learned to use my miter saw yesterday. Which that thing scared me at first! 
My plan: I am attaching a 2x4 to the joists above which run perpendicular, then building my wall on the floor before attaching it to the 2x4, the concrete floor and to the big 4x4 post on the side. I'm more worried about knowing how to make it plumb, at this point. I have to make two of these to span 16 feet.
After I make these then I have other issues to deal with.
Thanks!
I bought a framing nailer, a concrete gun, a level and the wood I bought yesterday. It seems easy enough, but I don't even know how to use the level.


My plan: I am attaching a 2x4 to the joists above which run perpendicular, then building my wall on the floor before attaching it to the 2x4, the concrete floor and to the big 4x4 post on the side. I'm more worried about knowing how to make it plumb, at this point. I have to make two of these to span 16 feet.
After I make these then I have other issues to deal with.
Thanks!