Some tips that might come handy:
Use a wooden pencil to do the sketch (preffer #5 thin)
Use a ruler or transporter to make lines
Mechanic pencil to do the outlines after you finished
*Always draw clear and dont hold the pencil on the tip (the farther you hold it, the lighter you draw)
*Don't draw with a sharpened pencil, always doodle, etc. to get the tip of the pencil on a rounded form
*Start by doing the circle, chin, facial details and ending with the hair.
*Shading is the last thing to do, no matter how ugly your drawing seems, the shading will make sure to give a nice look.
-IMO it's better if you shade by one side only -doing it on the left its more common-
How to import drawings into MS Paint (My own way)
1- Open Microsoft Word
2- Press Alt + I + P + S
3- Select Web or Printer Quality
4- Wait to be imported
After it's imported
1- Copy the image
2- Open your MS Paint, SAI or Photoshop
3- Crop your canvas
4- Click Paste
Simple
If you want some visuals, let me know and i'll gladly do it.
Kind regards, Kanakashy