BLENDER: Make your 3d model

Create your model
Now you should be starting to make your 3d model. We will not help you on this step because there are many tutorials out there.

But if you just want to make an object to see how it works: Press Shift+A and choose Mesh, UV-Sphere.

You will get a sphere now.

If you want it to be smooth and nice, mark the ball and click the Smooth button under Shading on left hand panel.

Press N to open the Object Properties panel. You can see the sphere is 2 meter big. Press N again to close the panel.

Press 1 on the keyboards's number pad to go to front view and 5 to go into orthographic mode.

If you do not have number pad on your keyboard look up View menu on the bottom panel. In there you can find the views and their respective hot keys. Look up the Numpad 1 which is "Front", as well as Numpad 5, "View Persp/Ortho".

Grab the blue arrow and move the ball up so that it sits on top of the red line. The red line is the ground. By doing this your object won't be half sunken into ground in game when you place it first.

Read More
Visit this article to read more on how to make a good and suitable mesh for game assets!

Good beginner's tutorials on YouTube on modeling
These videos below are the first part of series.