Promotion in the USA for a literary romance novel based in Cape Town

For my project, I'm looking for an experienced freelancer to help me get the word out about my new literary romance novel set in Cape Town. My budget is between $100-$500, and I'm hoping to promote it mainly through social media. I'm targeting adults aged over 50 as my primary audience. Ideally, I'd like someone who has a good portfolio of similar projects to show they have the necessary expertise and knowledge. If you think you can help me reach my goals, please get in touch!

Link to novel: https://www.amazon.com/My-Side-Ocean-Ron-Irwin/dp/1770108335/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1690170726&sr=8-1