Time, patience, and practice.
A great way to start is by building your own DIY microsurgery setup. A simple microscope, find needle forceps and a suture pad should suffice.
Start with 6-0 and progress to finer suture sizes, and begin with your basics, gradually progressing to end-to-end and end-to-side anastomoses.
Impeccable technique and a steady hand is everything!
On the 7th of...