I am curious as to how people put signatures and any other creative things on posts. I'd appreciate knowing how. Thanks!

Do a search for signature and you'll get the link to produce them.

Go to this link:
http://www.mylivesignature.com/mls_wizard1_1.php
and follow the signature wizard instructions.
Once you get the signature you want, then choose 'want to use this signature'
then choose the 'generate BB code', then 'generate code for my hand written signature'. When the code is created, highlight it (the code) and copy it to the signature spot in your profile. Once you put it in the profile spot, click on update. Follow these instructions exactly.