Ok, so I'll go into some detail on dovetails. These dovetails will attach the back of the drawer to the sides.
A dovetailing square has a straight side and a tapered side. The straight side is used to mark the endgrain part of the dovetails.
This is a very nice scoring tool. I set its length to the thickness of the other board, and marked the depth of the dovetails.
Then the tapered side of the dovetail square is used to draw the dovetails, matching the markings on the endgrain and going to the scored line.
Start cutting on the line with a dovetail saw, designed to cut into endgrain. The other board is clamped along with the piece in the vise, for stability.
Once the cut is started, angle down along the diagonal line, to make sure the saw follows the line.
Then finish off the cuts.
The end bits are cut off with a crosscut saw.