I want to best project ideas for startup in web development

Answer 1

Don't waste time looking for the "best". Google for "web project for beginners", chose one and start.
https://www.geeksforgeeks.org/10-best-web-development-project-ideas-for-beginners-in-2021/
https://www.geeksforgeeks.org/top-10-front-end-web-development-projects-for-beginners/
https://www.upgrad.com/blog/web-development-project-ideas-for-beginners/