Pure water is essential to good beer – and brewers pay scrupulous attention to the source and purification of their brewing water. The water used in brewing is purified to rigidly set standards. If it doesn’t have the proper calcium or acidic content for maximum activity of the enzymes in the mash, it must be brought up to that standard.
The most difficult part is waiting for your beer to come of age. While beers are drinkable after a few weeks, the average homebrew reaches peak flavor anywhere from 8 weeks to 15 weeks after brewing. Most homebrewers can’t wait this long. During the aging process your beer will carbonate and excess yeast, tannins and proteins that create off flavors will fall out of your beer and settle to the bottom of the bottle. This will substantially improve your beer. I personally recommend waiting about 3-4 weeks after bottling before sampling your first brew.