Need Help with Lead Generation for My IT Startup

I’m planning to start an IT agency offering services like web development, digital marketing, cybersecurity, and graphic design. I’ve already developed the website for it, but now I need help with lead generation and would love some suggestions on how to get started. Is it better to do cold emailing or cold calling? What are the best ways to find potential clients? Also, if anyone is good at sales or pitching and wants to join me, we could work together to grow. What are the best tools for lead generation that a startup like mine can use? I’d really appreciate your advice and suggestions!