It's really a numbers game. I'd recommend reaching out to 50 companies. If you only have 2% say yes, you've got an internship.

That being said, there are a ton of great training programs online which you will probably learn far more from which are taught by established people. There are many companies where the digital marketing person isn't super savvy.

How have the results been on your ad campaigns? If they are good, you can easily mention your results to get a foot in the door. I'd recommend not looking needy when talking to the business owner. Try to show how much value you are going to bring and it won't take much of an investment on their part. It should look like a no brainer.

Let me know if you'd like to discuss the best way to craft your intro to get a good conversion from these companies. I'd have to learn more to best tailor your approach.