Heyy dearr, I like uhh, working on the characters first, sort them out, then sort the lore/plot out and try to figure out what fits better. If you don't got any ideas, then look at other lorebooks or series to get inspo but don't copy it all exactly just the inspo you got and try to implement in in your world/series! Hope that helped.

I usually just write the lore as I go. Like I create a bot, and then I make another bot and think they'd be cool in the same universe. And from there I create a universe. The only exception is my sci fi series. For that one, I already had a setting idea before creating characters.

First generally it's when i start a bot, i'm like "sht but i gotta do a serie abt that can be cool" and then boom, i start to do lorebook (generally takes 2 weeks, I'm not productive heh); timeline, keywords, organisations of lore/ideas...
Stuff like that

im so bad at thinking up series i just throw random plotlines in for fun

My process is to build the world before I build the characters. I do this because I want the world to be important to the lore just as much as the characters are, especially for fictional worlds. Since lorebooks are a thing now, I want to rework my old series as well because so much information was left out due to token space, but I don't have to do that anymore. The only tip I have is don't be afraid to get creative in world-building. You can overdo it. Don't hinder your imagination. Let it run and sprint free. In my opinion, that's the best part of it. It's the most fun, too.

Idk what to help you with, I'm someone who doesn't dig deep in the lore, I just go along with whatever idea I have, I changed a lot of primary intros before posting my bots. I guess the most important part for me would be to figure out what type of vibe you're trying to go for.

For me idk how my fans even deal with me because I’m still writing my world building story and I have like 8 bots in the series so far. I just been creating as I go. But what I recommend start off with the world go a bit into the lore and use that as the foundations.

You swear a lot, it turns me on.

I usually create a file in google docs and write description of the lore, details about the world, and which characters are part of that universe. When I have doubts, sometimes I use Gemini to help me figure out what would be interesting to add or improve—I also ask my friends their thoughts about.
But if it's something from other cultures that aren't from my country, I usually do a little research to gain a better understanding before putting my ideas into practice.