What strategies would you use to generate leads?

It depends on what you're marketing essentially. I never choose a lead acquisition funnel without market research. But, for 0 to 1 products without a proper PMF. Start writing blogs (don't do keyword research), and see where you start ranking and what works. Ask people to try it out (write cold emails, send Twitter DMs, and send connection requests). Then depending on the feedback, strengthen the channels that work best. I recommend that none of my clients go for paid advertising until they have the basics figured out.