To use the puller, start with the handle and the long pin down (sideways). Then put the wheel on the outside, push the handle down and it pulls the bearing out.
Repeat to pull out the other bearing.
To use the press, stand the pin up and put a bearing down on the pin. Next put the wheel with the outside of the wheel (usually the printed side) facing up ad put another bearing on the pin. Tip the pin down (sideways) and carefully pull the handle down. You may have to guide the bearings a bit to get started. The aluminium hub wheels may be a bit trickier than the nylon hub or no hub wheels. Do not use excessive force. A very small amount of silicone oil around the out of the bearings usually helps ease them into the aluminium hub wheels.