Its pretty good for five minutes. 6.5 or 7/10
Not trying be harsh but you will not become a GFX artist for MPGH, that is for the GFX Team and Jr. Graphics to a certain extent.
However depending on you capabilities you might be able to join one of the many GFX Social Groups on MPGH such as Minimal Reference, D.I.K, Fusion Betrayal etc.
But by far the simplest way is to just be active in the GFX section and improve on your skills.