It's very hard to tell and I think that nobody can tell you what is the best Linux distro for you. It is just matter of personal preferences. For starters I would probably go with Ubuntu. It's great distro, very user friendly for beginners. If you want something more lightweight then you could try Arch, Mint or something similar. If you want the most lightweight distro then I would probably pick Tiny core. But anyway, like I already said. Nobody can tell you what would be the best for you. There are even distros dedicated to look very much like Windows or Mac for easier transition of new users.