How I can have an avatar?

[Devid_777]

Hi to everybody!
I'm a "fresher" here.
I'd like to have an avatar, (like other "forumers"). But I don't know how to do this. ;-(
Could you, please help me. Does anybody know where to download it?
Or if I have a large picture, is it possible to make it smaller, and suitable for the forum?
By the way, what it the limit size, in pixels and kb?

Thanks in advance..

Admin Edit: Changed hidden punctuation links to TWL. Don't spam.