Good heavens, it's not hard. The 3.0 apprentice rules even said something to the effect that at second level there should be no difference between picking up, say, rogue 1 then wizard 1 and picking up rogue0/wizard0 then rogue1/wizard1.
So build your character at second level (saving throws, BAB, skill points, hit points, all that), then decide with your DM what you get at first level and what you get at second level.
This is one of those things that I offered in my campaign and everyone ignored (along with stuff like teamwork benefits, rituals, etc). It's apparently a niche rule for a reason, but I think it's cool.