If you want beer, for me, Corona is the easiest to drink. It's quite light and not as bitter as most beers.
But then, also consider, the better the beer, the higher the price. Becks and Heineken are priced like that for a reason.
But you'll probably wanna go the vodka route, considering you can mix it with just about anything and it'll taste fine.
But stick with premixes, to be safe. Smirnoff Twisted and Reds are good. Twisted's come in flavours, but Reds are just your generic citrus flavour, with less alcohol than the Double Blacks. And oh man, are Double Blacks good if you just want to get shitfaced.
I like Cruisers because they all taste quite well, and are easy to drink. Only problem is they're low on alcoholic content so you need more to get drunk and therefore spend a lot on them.
If faced with Rum, Bourbon, Whiskey and Scotch, always go for rum first. The others are harder, and if rum is enough don't go any further.
I personally, can't drink bourbon. Even mixed with coke, I just can't stand it. And the smell of scotch and whiskey alone is enough to put me off.
But when you first start out, you need to take things slow or else you're just going to get sick.
always, always make you've eaten before you start drinking. or else the alcohol will hit you harder and you may black out.
But at the same, wait a little while after eating before you drink or else you may throw up. Not that that's a bad thing. In my experiance, throwing up while drunk is not that bad. It's less painful than when you're sick, and you do feel better afterwards. And the first few times you drink, if you're not drinking something that's right for you, you probably will throw up. Just remember to take a few sips of water afterwards to rehydrate yourself.
And if you start feeling sick, sit down and take a breather. You're just going to get worse if you push yourself.
You can eat while you drink, and that's a good thing to do, just take it easy so you don't throw up.
If you feel hungover the next morning, and by that you'll have a throbbing headache and feel dehydrated. So what you should do is just take some panadol and drink a lot of water. But if you can, drink something like Gatorade instead. You know those 'electrolytes' they go on about? They help you get rehydrated quicker, and you'll feel better faster.
But never take a panadol while drinking, because it allows to alcohol to hit you faster and harder and thus you may black out.
Just remember, the first few times will be trial and error until you find what's comfortable for you.
Then have as much fun as you can.