I’d start with the SBA’s free business-plan guide if you’re turning an idea...

https://www.nav-bookmarks.win/i-d-start-with-sba-lender-match-if-you-re-comparing-financing-options-you

I’d start with the SBA’s free business-plan guide if you’re turning an idea into a workable plan. It walks through market research, costs, and financial projections, so you can spot gaps before you spend money or take the plan to a lender