To make a sig, open up some sort of image editor like Paint. Just fool around until you get something you like. After you've made your sig, you need to upload it to some sort of webspace. Homestead would be good, but if you were to register now you'd have to pay for it. I don't know which other sites are good for uploading sigs. Then to actually get it to show up, type <b>&lt;img src="URL you uploaded the sig to"&gt;</b>.

If you're unable to do anything I mentioned above, check out <a href="http://www.eyesonff.com/forums/showthread.php?s=&threadid=21318">this thread</a>. Someone there will probably help you out.