Welcome! So the way Lemmy works is similar to how Reddit works. There are communities where people make posts and discuss telated topics. These communities can be as specific as a fandom for a certain book, movie, or video game, or as general as any meme that gets a giggle out of you. Luckily I am on jerboa too, so in the bottom left of the page there should be a magnifying glass that will let you search for any community you want. The majority of users here are pretty tech savvy, so the Linux and programming related communities are pretty active. Join the ones you like, block the ones you don’t like. You can also change the posts you are browsing to see only posts from communities you are Subscribed to, to Local which is only communities in the server you made your account on, and All which is anything and everything. Be prepared to see a lot of NSFW if you browse by all. Have fun and if you have any more questions, I’m sure anyone will be willing to help how they can and recommend new communities. I’m a big fan of Non-Credible Defence, but it is definitely not for everyone