First off, thanks for playing and posting!
The exact pace of XP comes down to how you play, and how you play to your alignment. We figure 7-9 XP per session is pretty typical, with second level being in range in the first session. If everyone is tending to get more or less than that, no problem.
The vagueness is intentional, actually. Most of the alignments will prompt discussion, and that's fine. The wizard's Good alignment is probably a bit straightforward, and it's definitely something we'll look at. Off the top of my head, I might suggest "When you use magic to protect or defend an ally ..." There aren't many spells that directly do that directly, but there are many ways to indirectly do that via magic. I'll mark this alignment as one of the problem spots and hash it out with Adam, he's great at alignments.