The first easy way is to contact a platform that promotes Social Media Influencers like tiktok ads agency . I know that tiktok is one of the most famous platforms right now, so it's obvious it has millions of followers. They can create TikTok Ads for your target audience or promote your business via Influencers. The second easy way is to go on Youtube, for example, search the Top Youtubers and contact them directly. Most of them have email addresses in the description box of their videos. I think you will find an influencer who will promote your business, but I don't think it will be cheap.