WIth all of the new options and the new rule set, starting a new game without any experience in Arcana Unearthed at higher than 1st level would be nearly impossible. I've read the book cover to cover, have been following every bit of news and preview out on AU, and I don't feel competant to create a 5th level character. AU simply has too many options.
If this were a new D&D campaign, I'd be happy to get some 6th or 7th level characters going. But I think the first AU campaign would be too confusing.
But, what I will do, if that's what you want, is power you through the first 5 levels. I'll make sure that you level up at least every other session if not faster, until you reach 5th level. Does that sound OK? At least that way you have time to get a feel for what's going on in the world and in the rules.