Thanks, and your signature looks good! You can also add other things to your signature as you get involved in the community. There's more info about it here.
A great place to credit the person who made your avatar (which is lovely!) is in your signature. If she has a website you can link it, or if not you could just list her name. You can look at my signature as an example.
Hi Elya!
Allow me to welcome you to the site as a member of the Welcoming Committee!:welcome
First let me tell you that you should check the stickied threads in the introductions forum.
Second: to become a citizen you need 25 posts, an avatar (that should be 110X170 and humanlike) and to fill the citizen application form.
And finally let me tell you that I really hope that you will stay around and that you should know that I am here for you; if you want to talk or need any help dont hesitate: Message me!
Yours,
Padron