Exploring Knowledge Graphs and Ontologies: A Beginner's Inquiry

Hi everyone, I am a noob to this field and after reading up about it, I am intrigued about the possibilities with knowledge graphs (and also its on the beginning hype cycle with Gartner). I was wondering, since I am seeing a lot of questions around ontologies, whether a meta-model can be used as an ontology, like the ones found on the OMG group. I see there are other business analysts/architects here Veronika Haderlein-Høgberg, that also want to solve business issues.