Ive been training for 8-9 months now but Ive done plenty of homework all around on boxing. What your nephew said works. But to build hand speed get a small elastic tube, you can find them at sports authority in the fitness section, when you shadow box hold on to each end of the tube and shadow box as you normaly would just with the elastic tube. To build power use the heaviest gloves you can and get the heaviest heavybag you can, then punch that about 20 minuets a day, over time your power will increase. Good luck!
