This is the most asked question I get BY FAR.
Every guru will give you a different answer, some say do outreach, some say offer free work.
My recommendation, and what has worked the best for me, is MAKE CONTENT.
I tried outreach for months and got nothing. Now maybe I just suck at outreach, but I know for a fact that leads YOU reach out to are a lot harder to close than leads that COME to YOU. Unless you're a trained salesman, good luck convincing leads from cold outreach to buy your systems.
That is why I say make content. Now I know, it's outside a lot of your comfort zones (it was for me too), but it is always the thing outside your comfort zone that will INSTANTLY make you grow. I posted 2 videos. JUST 2! And that got me my first client, and its only been up from there. My only regret is wishing I made videos sooner. So there's the secret; make your social media accounts, fully optimize them, put call booking links in your bios, and just SPAM CONTENT!!!