This is where you want to spend most of your time reading
To Narrow that down further
As @NiamhAstra said
WIKI - BEGINNERS GUIDE to implants & becoming a cyborg 
VERY INFORMATIVE PAGE Read it all, watch the videos and check out the matrix
Once you have read those, you will likely still have questions, but also a much better understanding.
So read up, THEN, come back and ask away.
