I'm also pretty new, but from what i've gathered it's basically an ad-free, algorithm-free way to connect with other people. Sharing things you like, asking questions and recommending things. A way to share a more real version of yourself than you are able to do on other platforms.
Just watched a 3 hour video-essay about greek mythology, and goddamn am i jealous. Why can't a king fall in love with my girlfriend, then steal her. After which i go on a 17 year long voyage to find her, during which i anger between 17 to 42 different gods, who then turn me into a sheep with breadsticks for legs that can only communicate with tongue-clicking. And in order to undo the curse i have to travel to the underworld and preform the most bedazzling dance in front of Hades, making him burst into tears of joy. Anyways, pretty interesting stuff that mythlogy. Can recommend.