Greetings,
Well,when this is your first try,than it's a very good start.In the mean time we all start to know how difficult 3-D modelling is.Specialy when you dont went to school for this.The only thing you should do is continue,your try-outs.You wil see in one year,maybe you are working than on more difficult 3-D programs.
Very good job,keep on with the good work.
Regards
Marc