You can follow most recipes using pale ale, lager, blonde and real ale kit cans by switching the kit can out for one of your lagers if you're going to be playing with hops via a boil or steep. Whilst the kit can does have flavors, think of it more as your bittering addition with malt for the beer.
The recipe posted above looks nice, but after steeping grain, always bring the liquid to the boil after removing the grain as to sterilize it. Grain should never be boiled, as it will release unwanted flavors.
There are two choices with steeping grain or crystal.
1. Put 3L of water in a pot with the grain in the fridge for 24hrs before use. Remove from fridge, remove grain and boil.
2. Put 3L of water in a pot at 67degrees and add grain. Temp easily achieved by adding 2 parts boiling water to 1 part cold in tap water. Remove grain after 30mins and boil.
For both methods it's easiest to have the grain in a bag of sorts so it can easily be removed. Your local might have some grain bags or hop socks. Otherwise stitch up some chux cleaning clothes.
