Is this considered a bad thing?

[Cryusaki]

So I was going to make a Portrait from a character of one of my favourite games
As you can see below the character isn't in the shape of a human so I thought I might as well outline it
I am fairly sure the picture came from the official development team
Is it bad practice to outline a character to get the perfect picture?  If I do, do I need to cite the source of the reference picture?
If I just copy the head and not the body is that okay? Im stuck on this,  thanks


The red lines are what I drew

[Lóng]

Imo there is nothing wrong with tracing the lines for learning's purpose, but whats way more effective(at least in my experience), is actually trying to copy the lines by looking at them the error might be going to be grave at first, but you'll gradually get closer to no significant error at all, whats even more effective in the long run( and most fun imo) is trying to understand the underlying structure in the process and maybe later on even drawing the reference from another perspective or with another pose or both.