Cider is a good first-timer drink to get you accustomed to the taste of alcohol. You could also go for mixed drinks like vodka+redbull or rum+coke. Just don't mix them too strong. I really like rum and coke.

If you want to try a beer right away, you might want to try something like a german-style wheat beer. They've often got a light texture and sweet flavor. This was the type of beer that really changed my opinion of beers in general. I hated beer until I tried one of those.