Lesson 1: a simple chair builded from a cube

Now that you have installed Blender we can design our first object: a fantastic chair!
Open Blender, you'll see the monitor subdivided in several panels, main is the 3d View where to add, edit and transform the items; by default there is a cube, a Camera and a lamp, all we need for our first render, press F12 to see it!

Wow, it's very exciting at first, but not so cool to be honest, so we will edit it to obtain the seat, so press N on your keyboard to open a bar on the right, look at the Dimensions section, change them to:
X: 0.45
Y: 0.45
Z: 0.05

 

Now is the time for the legs, we need of another cube so click on:

 Add-Mesh-cube

Still from the right panel - Dimension section, change in:

X: 0.05 

Y: 0.05 

Z: 0.40

Well, the first leg is prompt, we just need to grab it in the right place, a seat corner, the Snap function is what we want, look at the low bar, change selection to Vertex as in the photo below: 

Ok we can grab it, press G for movements, and keep pressed CTRL for the magnetic snap, move the mouse near the corner to get the correct position, more precision is possible with the zoom, just rotate the wheel mouse, ok, the first is set, now we have another 3 to locate! Press the T key to open another tools panel on the left, object section, select the leg with the mouse right and press Duplicate Objects, put the second leg in another corner:

Duplicate other two times, and finish the lower part:

Very well, we just need of the seatback, add another cube and change dimensions: 

X: 0.05

Y: 0.45

Z: 0.45

Snap it over the seat to obtain our first project in Blender!

A chair made with 6 parts, should be better to join them in a unique form!

select all of them with Shift and right mouse click, or with B for a square selection tool, press CTRL and J to do it, otherwise click Join in the Edit section of the left panel, and the work is done!

Save our first project, be proud of it!

 

 Our fantastic, first Blender 3d object: