Blender shortcuts:

G: grab

S: scale

R: rotate

Can be followed by axes on which you want make the modification.

For instance G+X

R+Y

S+Z

You can add a unit.

Let’s say you want to move a cube 2m away on the x axis:

G+X+2

You can use all those shortcuts anywhere in the software.

If you want to edit an object got to edit mode at the top left of the viewport or press tab.

Then you can get into vertex, edge or face mode and modify them to alter the object.

Edit mode:

i: Insert

E: extrude

1: vertex mode

2: edge mode