Before coming into the program I would highly stress putting together a comprehensive product roadmap for the duration of the program as well as 2 months after. Start by splitting the upcoming 3 months into individual weeks & writing out goals both for the tech side (development, design, ux etc.) of the company as well as the business side (sales, fund raising, partnerships etc.). If possible have them written on a huge calendar for everyone in the company to see & be aware of.
Then go more granular and translate those weekly goals into individual tasks using any project management software, here I’d recommend Trello since its very intuitive, has great array of browser plugins to support different styles of task management & it’s totally free.