There are very many negative effects of alcohol, especially excessive in short or long term excess. But you ask about the effects as a drug that are seen as good. Every person is different; therefore, the effects of alcohol vary from person to person.
Improvement in mood, higher self-confidence, less anxiety, less apprehension, less fear, loss of reason, less caution, few inhibitions, higher sociability, usually more talkative
You might express your wants and desires, secrets, and release your inner soul.
Again, caution and however, although people drink alcohol, there are plenty of negative effects.
As to tips. Keep hydrated since alcohol causes dehydration and its effects. Do not operate heavy equipment or vehicles. If you drink to get very drunk you are on your way to alcohol addiction.
I live in Las Vegas. There is a lot of alcohol around. But wait until you are 21 if you wish to visit.