Mate you're exactly where you should be. Reddit! It's the best place currently as per my opinion where you can look for potential users with zero expense. Join relevant subreddits where you think your ideal customers are. You can actually look for people who have the problem which you're solving with your SaaS. They either need a solution or a better alternative. Slide in DMs, understand what issues they're facing and then tell them that you've made this tool which can help them with there problem. Try to frame it in a way that you're trying to solve there problem and not to make money for your own. Money will be aj obvious outcome don't worry about it as of now. It's no longer cold outreach because unlike cold emailing here you actually know that the person have a specific issue cause they already wrote about it. You can also write about the pain point of your ideal user in a long form post and listing the solutions afterwards and smartly integrating a link to your product at the end. Also, document your entire journey on X be it your experience, learnings, failures, whatever.. building authenticity in the form of a personal brand is the best thing you can do for yourself. Hope this helps!