Kia ora Kirsty,
Thanks for your question.
You’re right, Facebook ads can be very confusing and daunting when you first get started!
Totally agree with the previous comments. If you’re interested in doing some learning and research yourself here are the recommendations I would make for you to get started and grow your sales.

I definitely recommend Facebook/Insta ads and the best way to learn is to give it a go!
You already have a decent size audience so I would start with targeting the audience you already have. This audience would be Facebook fans.
Then start experimenting with other audiences. A look-alike audience is a great way to grow your audience and find new customers.
If you have a website then it is important you set up your Facebook pixel so that you are able to run remarketing ads.

Doing these few things alone can make a big difference in my experience.
If you are unsure about setting up a pixel ask your web developer to do it for you.

I hope this helps, good luck with the ad, and f you have any other questions, just let us know

David ?