Just be yourself, follow and engage with people of a similar interest, there a re a good few people on here interested in Astronomy and a great number with PhDs too, I am in to astronomy and science so happy to connect on that,
I like the fact that on here, someone can post what is going on at a conference, I can comment and from that have people like my comment, this is a conference for people like yourself in to Astronomy at a very high level.
I think it may have been to do with exoplanet atmospheres.
We are all welcome regardless of our level of understanding or experience.