If you want a different avatar you need to make an account on gravatar and assign the avatar from there.
As for website feature. What exactly do you mean? There's already a section in the profile for adding a website link. If you need more you can put them in the "About Me" section.
For future reference, break up your text in paragraphs when you go to another topic/thought (like I've done here). Makes it much more inviting to read and thus more likely to get a response.