I'd like to congratulate you and your family on the decision to become home owners for
the obvious personal reasons & also on the numerous financial benefits.
Getting Pre-Approved is simply your first step to home ownership! It comes even before picking the kind of home you're interested in because you don't want to waste time and energy on properties you don't qualify for.
A Pre-Approval is basically a document that reflects your actual purchasing power but it also shows Realtors & Sellers in writing that you're a serious buyer and not just someone wasting everyone's time.
Absolute worst case scenario if you can't get pre-approved your loan officer will bring any issues to your attention and advise you on ways to resolve them so that you can eventually purchase your own home.