Have you worked for free yet? If the answer is no that’s where I would start.

Reach out to influencers with a large following and ask them if you can make them a logo in exchange for an IG cross / shared post. You have to give in order to receive.

From there, you will hopefully get traffic to your page, they click your bio, and you get a few sales.

Lastly, have you tried searching for leads on Reddit like this?