If you do not already know this then beers are more or less put in to two main categories; you have the ales and you have the lagers. These two categories are significantly different from each other but within them you have a lot of subtle changes and variations with different tones, colours, feels, and flavours. To understand how the two types are different and which variation of either type you should try, you need to know how beers are made and what sets ales and lagers apart.
The first thing you need to know is that grains, water, hops, and yeast are the main ingredients that make a beer what it is. The grains used has a huge impact on the strength of the drink. Normally large companies make their drinks out of rice or corn. This is used mostly because it gives beer a weak flavour that can enjoyed by the average person who is not in to drinking beers as much, and also because it reduces the cost of the brewing process quite a bit. Barley, rye, or wheat generally give a stronger and more pronounced flavour.
Lagers have their yeasting process done differently than ales. In lagers the yeast manages to eat more of the sugars and so it has a much crisper and purer taste. Lagers are generally lighter in their colour and are not quite as flavourful as ales are. The ales can be fruitier and the undertones are usually stronger. The flavour is kept because the yeasting process does not eat up as many sugars in ale. The ale flavours are generally stronger and the colour comes from what is added to the brew. You will find a lot of different home brews like this in Gramercy, one of the bars in the CBD.