omg… probably Moviestarplanet LMAO
back when it looked much different.. idk what year it was tbh
it was very popular in my country and remained so for a long time.. many memories were made, I miss it

i think mine was youtube followed by club penguin? back when you actually had profile customization on youtube and it doubled a little as social media
i remember my parents having to call an isp to sign me up for email through the phone because we didn't know about gmail yet too, lol

Uhhhh I think the first websites I joined on my own had to be the pet sharing website Petpop or Blingee LOL

its kinda hard to remember the timeline of what thing came first but proooobably freerealms? im still waiting on freerealms sunrise LOL. but the first social media forum type thing i signed up for was nick.com back when they had forums. i loooved writing really bad dumb dragon ball z fanfiction, my username was puar

Nick.com as well....!!!! But I didn't use the forums so I can't recall why I found it necessary to make an account? I just played the weird little games

Hahah technically it was probably either Neopets or.... freewebs.com, now webs. I used to RP warrior cats on there and people would make websites to host their own "clan" RPs, self included. I was probably way too young to be doing that, but it was fun!

Later on, I joined Howrse and Furry Paws because I was really into virtual pet sites in general, and I ended up signing up for a lot more from there. Those were the first online communities I really got into and made friends on.

I'm also not sure of the timeline of things, but I'm pretty sure it would've been Neopets or Webkinz? Apparently, I joined Neopets when I was 6! Not sure about Webkinz since my accounts are unfortunately long gone.
A little forum called Chao Island, based around the pet simulator minigame from Sonic Adventure 1 and 2, would've come next. I think around 2008, when I was 7? I spent a pretty long time there...