Geek Waba~B

Hey fellow Geeks
I recently got a new PC, and I do not want to get rid of my old one. I was thinking I could put my web coding and Flash coding together and make a website. I was thinking of making my old PC a server to put my site on to then run it to the internet. I'm trying to learn all this stuff so if a few of you could help me out. Tell me what the best OS is. I'm assuming Linux, what version?? Once I got the OS making the site through Dream weaver and Flash on my Windows Machine, what do I do to my server machine to get my site on there, and from there out to the webs??

I hope I didn't make this too confusing and sorry for any miss spelled words or grammar.

Thanks!!