There are numerous networks where bloggers and influencers can connect with brands. Here is a good post which lays out many different platforms you can check out: https://influencermarketinghub.com/top-influencer-marketing-platforms/
Hope that helps...
Possible way to find an Influencer: Follow the hashtags! Search the hashtags that are related to yours, and - do you see top results? Those are your potential Influencers. Follow them for a couple of weeks and hire the ones you like THE MOST.
Aria here, I'm on the Social Care team at Shopify. ?
We have a great blog post that may help, 6 Influencer Marketing Platforms for Partnering with Internet Famous Creators.
If you're just starting out, I'd look at micro-influencers with over 10,000 followers as that is likely to be a more affordable option than a macro-influencer with over 100,000 followers.
I agree with the previous poster who said, 'follow the hashtags!' If you were putting an image of your product on Instagram, which hashtags would you use to ensure the right people saw your product? Those are also the hashtags you want to use to find your influencer. Follow a bunch of them first until you decide who you want to approach.
Social Care Guru
Carro is a free app that can help you identify influencers to work with. It uses your data to find influencers who already have a connection to your brand. These influencers are past customers, email subscribers, and social followers that love your brand and are eager to work with you.
It takes just a couple minutes to set up, is free to use, and will reveal a list of quality influencers so that you can start your first influencer marketing campaign.