Congratulations on your SaaS startup idea! To develop a successful SaaS product, you should begin with thorough market research to validate your idea and identify your target audience. Next, move on to the planning stage, where you create a detailed product roadmap, define your features, and prioritize development tasks. After that, proceed with the actual product development, followed by testing, deployment, and continuous improvement based on user feedback. For a more in-depth understanding of the stages and considerations involved in SaaS product development, I recommend reading the article at https://www.cleveroad.com/blog/saas-development-cost/. This article covers various aspects of SaaS development and can provide valuable insights to guide you through your product development journey.