Point me in right direction!

[acy44]

· Signature file
• Pictures are permitted within your Avatar, Signature and Posts, images should be uploaded to our gallery. The following images / text are not allowed: obscure images or offensive text, porn, anything related to an anti-racial group, and any other imagery the staff deems as inappropriate. We reserve the right to change your avatar / signatures / posts without further notice.
• Please limit graphical signatures to 200x200 pixels, 10000 bytes in size and use our gallery for upload, or link from elsewhere. < Is all this taught in here? Because I haven’t the faintest idea as to what an Avatar is, and the ‘pixel thingy’ and ‘10K bytes’, well I’ll just have to learn as I go along. Can someone point me in the right direction?
Attachement < ‘DITTO’ Above! < Am I even in the right Place?
Is there a guide to this stuff? A dictionary even?