I recently described the
é sound in ELA (é-lah) as the a in battle (American English), and the
ê sound in ELE (ê-lee) as the first "e" in benefit. Or something like that. =)
This is how Brazilian Portuguese speakers easily tell them apart--by the sound of the first "e" in ele or ela.
You need to learn the conjugations for person + number. The one that aligns with "Ele/Ela" (the 3rd person singular) is the one you should use for "drinks" (obviously) and you should use "drink" with the rest.
You should probably get acquainted with a conjugation website: http://www.conjugacao-de-verbos.com/verbo/beber.php