You can score BIG points just being able to meet & greet in Brazil. Before you even know how to say anything else, learn these. Use them to practice your pronunciatiion - you'll be using them over and over.
For example -- Tudo bem is the main thing everyone says when seeing someone you know (or don't!). Let's say it now: tudoh bang. Ok, now go soft on the "bang" so it's more like "bayn". Tudo bem! Sonically, it's very satisfying. You will use this "bayn" sound in many other words and it's important to get it right. Besides, it just sounds cool!
tudo bem = everything good. It can be a question as well as an answer. Brazilians will also say, tudo bom. It’s the same thing, though it translates to literally: everything good.
Tudo bem? (All good?)
Está tudo bem! (everything is ok!)
The proper way to say this is, muito prazer em conhecer você >> very pleased to meet you.
But, that’s a mouthful. Brazilians usually shorten this to, muito prazer or even, prazer.
What about saying, how do you do? Brazilians don’t say that! You can say, como vai? or, tudo bem? instead.
normal > Muito prazer!
formal > Muito prazer em conhecer você.