Don't listen to those telling you this might not be the right place to present your drawings, mate. We're all one big family, right? And where else would be the best place to discuss those sketches than in the living room? If we discuss motor bikes here, and gators - or the "Babe of the Week", then this is not the wrong place to present your drawings.
I'm not an artist, but as far as I can see your sketches are still some ways from those created by Michelangelo, Leonardo da Vinci or MC Escher - but on the other hand side they are dimensions better than anything I ever produced. I'd say they are good enough to produce more.
Talent is like a gem - you have to shape and polish it until it gleams. There is a German saying: "Es ist noch kein Meister vom Himmel gefallen, aber schon viele vom Pferd", which translates to something like "No champion ever fell from heaven - but many did fall from horseback", which means practise, practise, practise. Talent is put into your cradle, but you have to practise to develop it.
You might think about producing some aircraft sketches to please the audience, though.
And if you'd present some nice drawings of naked girls I'm sure you had the complete attention of virtually everybody here in the forum.
chanklaus