Happy Friday everyone, I'm new here and i.needs your help. Any help will be appreciated. Thank you

Hello Everyone, hope you all are well. I'm wondering if you can give me any insights on what to do in my situation: I am 17 and I build AI-Assistents that handle customer service questions for Software Companies. I have already done 5 such projects for free to collect Testimonials and case studies. But I can't seem to get any further clients as the solution I sell is for bigger companies which are really hard to acquire as I am visibly young. The 5 projects I mentioned earlier were with smaller companies which were easier to acquire (as I was working for free as well) but can't give me any referrals or anything. So how do I get these bigger fish?