Only one minor thing, your name should come last, as you are the one responsible for the final artwork
But, now can I answer how bad is it: I've seen much, much worse.
The ship has way too many openings near the waterline and seems a tad overloaded, to the point that some equipment is interfering with what is next to it or cannot turn. The funnel also seems to be too small for the propeller size.....
The real question is, what do you want with it? do you want to make it realistic? Do you want to use it for something? Do you want feedback on the drawing style or the ships design?