How to get your first 100 sales as a start-up founder?

Hi everyone, I'm a software developer with a startup focused on creating solutions for the ergonomic, musculoskeletal, and physiotherapy industries. My first product, a posture detection and correction app, is now live, but I’m facing challenges with generating sales. The app monitors bad sitting posture in real time and prompts users to adjust, helping prevent long-term musculoskeletal issues and improve physical health through early intervention and consistent use. You can check it out here: https://posturecorrector.ai. If you’re interested in collaborating to boost sales or have any suggestions for driving growth, I’d love to hear from you. Thanks in advance for your support!