It really does depend what you want to do with it. My advise would be to set yourself a project and just google or ask people what you don't know. Tutorials aren't a great way to learn because you rely too much on copy and paste. Get a basic understanding (I might post some of my tutorials) and...
Signatures are really easy to make with a render rather than a blank canvas. It's not bad, but it's looks like you just slapped blending effects onto some text.
Here are some examples:
If you want one I need an image to put on it (video game characters/anime characters work well) and whatever text you want on it, if you want specific colors you should mention that too.
Cheese scones are really easy to make:
225g/8oz self raising flour
55g/2oz butter
25g/1oz cheese (grated)
150ml/5fl oz milk
Add the flour and salt into a bowl and rub it in until it looks like bread crumbs
Add the cheese and mix until even
Add the milk and mic into a dough
Make into small...