It's okay. I'm not an IT person either. That is how I have ended up in this position as a white rabbit. 😅
I guess the most basic Nostr thought experiment would be: When you write and post a note, where does it go? It obviously leaves your phone or computer, since other people are seeing it. Clearly, the answer is servers. In Nostr, those server are called relays. They are simple and light weight. Anyone can run one with minimal tech knowledge and no expensive hardware. Thousands exist and you can write your notes to almost any of them, as long as you have permission. Some of them host all content from anyone. Some are small, like a place for friends to hang out and chat. Others specialize in hosting very specific types of content, like blogs or music.
Being new and beginning in Primal, you are probably sending your notes to 2 random relays + Primal's own relay right now. You didn't choose these, they were randomly chosen for you. Now, what if you can take a peek at what else is published to these relays? Do you want to talk to other people who use particular ones and send your notes there, too? Maybe some of these relays specialize in hosting content that you really love to browse? Maybe you'd like to create your own collection of posts that you think others would enjoy browsing?
That is some of the stuff that I find interesting and under-explored. The concept spread so far that it's hard to capture in a single explanation.
Many clients enable viewing relays directly as feeds, though in some it is not a showcased feature. I've seen Yakihonne suggested to you. It does a nice job on this task. Primal doesn't support it at all. If you make your way into Yakihonne, here are a few suggestions to browse:
wss://aquaticchickentheory.nostr1.com
wss://theforest.nostr1.com
wss://spatia-arcana.com/favorites
wss://pyramid.fiatjaf.com/popular
These all surface users and content a little differently. You might notice some overlap, because users & their notes can live anywhere. With no algorithms, this is how we can discover and organize content. (It's also how we keep the scammers and spammers out of our replies, but that is for a different day.)
is very good for this, too, and it's not overwhelmed with features.

Jumble
A user-friendly Nostr client for exploring relay feeds