help with picture coloring OTH S1

[hotchad]

Hi again,

so I need a help please with finding the right coloring for pictures of OTH S1. they are so blurry & you can see all the pixels & I try to make an art but I just can't find a way to smooth the pictures & color them nicely,

I'll appreciate the help from you talented people ,
thanks :)

here's a picture with an example.