Mockup/Prototype

My name is Allan, an aspiring Haïtian entrepreneur who is looking to build a team and raise funds to pursue an enterprise idea I have. Before worrying about coding, I would like put together a prototype/mockup to conceptualize my vision and show potential hires, customers and investors what it s going to be building and get buy-in or push-back before spending on tech.

Thank you in advance for any guidance and tech assistance.