The aforementioned component tester kit can be assembled in 60-120 minutes, depending on your soldering skills.
Not much to say about it. Components must be inserted on the side with solder mask ("top") and soldered at the other side. Just keep transistors close to the PCB and mount both the socket for IC and the pin-header for display.
There is no specific assembly order since the board is pretty wide. Sit down and have fun.