EMERGENCY: I need help ASAP!!!!

I’m pretty much the new kid on the block here—can someone please tell me how to set up a signature with a quote or a link so it shows up automatically under every single one of my posts?
I see everyone else doing it, but I’m totally lost on how to actually make it happen. I tried searching through old threads for a guide, but nothing turned up—so sorry if I'm asking something that's already been answered a million times...

Any help? 🙄

That’s what a signature is for, though you can set yours up right here: 🙂

thanks a ton 😉