Quero viajar para o sul amanhã.

Portuguese often drops subject pronouns when the verb form already makes the subject clear.

• quero = I want
• so eu quero and quero both mean the same thing here

Because quero is clearly the 1st person singular form of querer, native speakers usually omit eu unless they want emphasis or contrast.

• Quero viajar... = neutral
• Eu quero viajar... = more emphatic, like I want to travel...

This is a very common Portuguese structure:

querer + infinitive

It works much like to want + verb in English.

• quero viajar = I want to travel
• quero comer = I want to eat
• quero dormir = I want to sleep

So viajar stays in the infinitive because it comes after quero.

Because para shows direction: to or toward.

• viajar para o sul = to travel to/toward the south

The o is the definite article the, because sul is being used as a noun here: the south.

So the phrase is literally:

• para = to/toward
• o sul = the south

Together: para o sul = to the south

Yes. In Brazil, para o is very often reduced to pro in everyday speech.

So these mean the same thing:

• Quero viajar para o sul amanhã.
• Quero viajar pro sul amanhã.

A useful rule:

• para o → pro
• para a → pra
• para os → pros
• para as → pras

Para o sul sounds a bit more careful or neutral in writing, while pro sul sounds very natural in conversation.

Because here it is being used as a common direction, not necessarily as part of an official proper name.

In normal writing:

• norte, sul, leste, oeste are usually lowercase

Examples:

• morar no sul
• viajar para o norte
• o oeste do país

You may sometimes see capitalization in specific regional or official contexts, but in this sentence sul in lowercase is completely standard.

No. Portuguese allows some flexibility with adverbs of time like amanhã.

All of these are possible:

• Quero viajar para o sul amanhã.
• Amanhã quero viajar para o sul.
• Quero amanhã viajar para o sul. (possible, but less natural in many contexts)

The version with amanhã at the end is very natural and common. Putting amanhã first gives it more emphasis.

No. Quero is present tense of querer.

So grammatically, the sentence says I want to travel... tomorrow. The future idea comes from amanhã, not from the verb tense.

That is very normal in Portuguese. Present tense is often used when talking about plans, intentions, or near-future actions.

Compare:

• Quero viajar para o sul amanhã. = I want / I’m intending to travel south tomorrow.
• Vou viajar para o sul amanhã. = I’m going to travel south tomorrow.
• Viajarei para o sul amanhã. = I will travel south tomorrow. (more formal/literary)

Usually, para o sul is the safest and most straightforward choice here.

• para o sul = toward the south / to the south

Ao sul can appear in Portuguese, but it often has a more specific or slightly different feel depending on context, and it is very common in expressions of location, such as:

• ao sul da cidade = south of the city

For a learner, if you mean movement in the direction of the south, para o sul is the best choice.

A rough Brazilian Portuguese pronunciation is:

a-ma-NYÃ

A few key points:

• nh sounds like the ny in canyon
• the final ã is nasal
• the stress falls on the last syllable

So it does not sound like a plain final a. The accent mark helps show both stress and vowel quality.

In Brazilian Portuguese, quero is roughly:

KEH-roh

A few notes:

• qu before e sounds like a hard k
• the first syllable is stressed: QUE-ro
• the r in the middle is softer than an English h, but not the strong throat r you hear at the beginning of some Brazilian words

So it is closer to KEH-roh than to anything like English kwero.

Yes, you would definitely be understood. The main issue would just be spelling/style, not meaning.

Most of the time, standard writing would prefer:

• Quero viajar para o sul amanhã.

So if you write Sul, it usually will not confuse anyone, but lowercase sul is the more standard choice in a sentence like this.

By itself, it usually means to the south in a general sense. The exact destination depends on context.

It could mean:

• the southern part of Brazil
• a southern region of another country
• simply heading south

If you want to be more specific, Portuguese would normally say so:

• para o sul do Brasil
• para a Região Sul
• para o sul do país

So the sentence itself is general unless the context makes the destination clear.