Changing sig picture

I want to change my signature picture, do I have to use a photo host site like photobucket?

 

Is there a better/different site I can use?

 

How do i get an avatar?

 

Pay a tenner for membership. (think I tried as a non-member but couldn't) Then simply click on avatar in profile and upload a pic.

 

One of the hosting sites like ImgBB https://imgbb.com/ , Imgur https://imgur.com/ etc I usually use FlickR for pics but they always leave a link with the pic which would look messy as a sig.

 

Thanks RJ