[Question about making signatures]

Hi, I'm new to paint.net.

I would like to learn how to make nice/cool signatures. (I'm pretty noob when it comes to this stuff, but I would still like to learn.)

Some examples of some signatures that I would wish to learn how to do below. (The signatures are made by someone on a certain gaming and trading site.)

Basically I would like to learn how to add effects like this to a signature.

Making it rain or snow, moving water, making something glow, moving flames, and other nice/cool effects to a signature.

What plugins are good to use for this and if there are tutorials on doing any of these effects?

Is there a certain place to find cool/nice backgrounds to put pic on and what are some nice/cool fonts to use for signatures?

Also what is the font that is used in the image below? (I want to use this font for the first signature that I plan to make.)

Thanks for any help at all, it is very much appreciated.