Well, that's an interesting proposition, but there are some problems with it. First of all, Zeno's paradox was resolved some time ago with the mathematical concept of limits, taking an infinite sum and getting a finite number. This is an important part of Calculus. So, Zeno's paradox can't be used as an argument for a finite universe, but you really have two arguments there, not one. Your second argument- that we couldn't move if the universe was infinite -doesn't quite work because movement is relative. Though we may not be moving relative to the universe, we can still be moving relative to the Sun or the Earth or whatever you would like to move relative to. Of course, I'm only thinking philosophically here, I know nothing about the reasons in physics why the universe is or isn't infinite.