For the alcohol I used a 1.14L bottle of gin. First I reserved a cup of it in a separate container (or you can just reserve it in the bottle) in case the flavored gin became too peppery and needed to be diluted.
The rest of the bottle I poured into a very large jar and the tossed in the lemon rind and pepper corns.
Just let the gin sit.
You can give it a shake every day or so. It will go from clear to a brown to almost black. I tasted mine every three days and it was peppery enough for us in one week. Don't go by how it smells, it will be very peppery smelling right away but the taste takes a few days to develop.
After all that hard work of waiting and occasional shaking you probably need one.