I can’t figure out how to add this server everytime I do it doesn’t work

sososo I LOVE my character Kiki, i figured its time for me to make a biography. Yet I have NOO idea where to start. Could yall give me some questions, themes, ideas, etc!! would luv some tips too!

how can i join a club ?

I didnt know which forum to put this in, so if its in the wrong one ill delete and move it. I brought a bike ages ago and came back to the game seeing its not unusable. I was wondering if i could sell it or get an item of equivalent value.

It wont let me join the server its saying i need a safer profile but i don't know what it means by that I've tried everything, logging into different accounts, using different updates (example 1.19). but its not letting me join. and saying specifically "missing profile public key. this server...

I'm very new to the sever and I downloaded the resource pack but when I get in, it just turns black for me and then when I look at the pack it says “Made for an older version of Minecraft”

So I was just on the server and I said "/OOC Does anyone want to rp with me? I'm near spawn." Right after I got a warning saying I was warned for "Meta Gaming". Could someone explain what happened to me? I don't know what "Meta Gaming" means and I don't see what I did wrong.

I was on this morning and for some reason when I try to log on now, it says loading terrain and then disconnected. Heeeeelpppp