How to organize data when starting a company?

As the title implies, I'm trying to start my own company, but I have so many notes everywhere, it starts to be overwhelming and I feel like I'm falling prey to analysis paralysis. I have a cork board with cards, I use Trello, One Note, I have Excel spreadsheets, so many Word documents, etc. but it all is super confusing. What do you guys do to streamline the process and make it visually convenient? Thanks a lot! :)