Founders are typically strong on product and weak on financial infrastructure. That's fixable.
What you'll want to know cold - Difference between personal and business credit - Personal guarantee vs. non-recourse - Business bureaus and how to check them - Vendor tradelines and how they report - How your personal utilization affects business applications
Habits that compound - Pay every vendor early - Never mix personal and business banking - Keep quarterly financials clean - Review both credit profiles before any capital raise
Financial infrastructure is a moat. Build it deliberately.