Certificate question

Greetings all,
Let me begin with saying that I am server dumb. My strengths are in routing so please forgive my ignorance. So I have an Openfire server that is used within my LAN only. I am trying to figure out how certificates and everything works with this. So I have the default self signed cert. Can I export this and install it on my local machine so I can use openmeetings with SSL? I’ve tried using openssl to generate a cert but again Im server dumb so I have no idea where to even begin with this as it always says “Pending Verification”.