How do we launch a Regulation A+ crowdfunding campaign?

I have read online that the new law gives startups the opportunity to launch equity crowdfunding campaigns. However, the regulation seems very complicated. Is it true that only certain corporations are eligible and the legal structure of your company is important as well? Do we need to hire a lawyer before even considering such a campaign? In terms of legal and consulting expenses, is there a significant difference to regular (non-crowdfunding) financing rounds?