I need help with my Signature!

I made a picture and I want to put it as my signature, however, I have no idea how to do this and Any other tips on how to make my signature better would be appreciated.

You first upload the picture to a site. for example Sadpanda.us then you take the url of the now uploaded picture and put it in your sig with [img ] before it and [/img ] after it but with the spaces taken out

will if you use sadpanda you'll actually see a part you can copy paste that says Forum style BBCode

well take that and paste it into your signature.

Now how do I do spoiler? It's too large.
Edit: Nvm

who is that girl