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.
Start by following the influencer and engaging with them with your business’s account(s). If you show genuine interest in the influencer, the influencer will be more inclined to show interest in your brand.
When you’re ready to get in contact with the influencer - it can actually be quite easy. Many Instagram influencers have their email address or the email address of their PR/talent agency listed in their Instagram bio, or in a contact button on their profile.
Even if you’re a small business or boutique, you’re going to have to budget for influencer campaigns, especially if you want those “bigger” influencers as opposed to microinfluencers. Even with microinfluencers, you should still have a budget. For many influencers, this is their full-time job, how they get paid, so a “gifted collaboration” often times won’t cut it.
Budget for the product/service that you will be providing the influencer “gifted” (for free) as well as the amount of money that you feel comfortable paying.