Harder it looks, better is for me! Look how much I improved(don't expect a pro job), in 3 days of tries.
One of my best result in the first day was this:
Today, after a bit of practise, I've managed to do start with this:
I wanted to have some coloring after it, just to think it's getting finished soon:
And then after like 1 hour I managed to do this: 
Do you think I can keep going modeling or should I try something else like furniture stuff or I don't know, I'm preparing myself for a nice 3d animation for sponsorizing steemit among my friends.
The difference between the start and the progress is noticeable, congratulations! Keep going!!! :)
What piece of software are you using? Looks like fun!
It's blender, a sweet open source program that can make cry most of the professional tools around!
Keep at it. It is a lot of work, never will you be done learning once you go down this path.
Are you using Blender? If so talk to @theanubisrider he is my son, and handles most of my 3D Work and is quite skilled at Blender.
I can LOOK at code and give you feedback, but I don't want to criticize anyone's 3D work when they are just starting as it is a tough road, and is pretty cool if you get the feel for it.
Keep at it, you're progressing nicely!