Azi nu am nicio ședință, așa că merg la poștă după prânz.

Yes. Azi means today and is a very common shorter form of astăzi.

• azi = today
• astăzi = today

They mean the same thing, but azi often sounds a bit more natural and conversational in everyday speech.

Yes. Nu am and n-am both mean I do not have.

• nu am = full form
• n-am = contracted form, very common in speech and informal writing

So this sentence could also be:

Azi n-am nicio ședință...

Both are correct. The full form may look slightly more neutral or careful in writing.

Nicio means no / not a single / none when used before a feminine singular noun.

In this sentence:

• nicio ședință = no meeting

It agrees with ședință, which is a feminine singular noun.

Compare:

• niciun băiat = no boy
• nicio fată = no girl
• nicio ședință = no meeting

In standard Romanian, when it means no / not a single, it is normally written as one word:

• nicio ședință

This is the negative determiner meaning no meeting.

If you write nici o as two words, that can sometimes be interpreted differently, more literally like not even one in certain contexts. For most learners, the safest rule is:

• use nicio before feminine singular nouns when you mean no
• use niciun before masculine/neuter singular nouns when you mean no

So here, nicio ședință is the expected standard form.

Because nicio is singular here: not a single meeting.

So Romanian uses:

• nicio ședință = no meeting / not a single meeting

If you wanted to say no meetings more explicitly in the plural, Romanian often prefers other structures, but with nicio/niciun, the singular is very common because the idea is not even one.

Ședință usually means meeting, session, or sometimes appointment/session, depending on context.

Common uses:

• ședință de lucru = work meeting
• ședință foto = photo shoot
• ședință la terapie = therapy session

In your sentence, ședință most naturally means meeting.

Așa că means so or therefore.

It connects two ideas:

• Azi nu am nicio ședință = Today I have no meetings
• așa că merg la poștă după prânz = so I’m going to the post office after lunch

It is very common in everyday Romanian for showing consequence.

Examples:

• E târziu, așa că plec. = It’s late, so I’m leaving.
• Nu plouă, așa că ieșim. = It’s not raining, so we’re going out.

Romanian often uses the present tense for a planned or near-future action, just like English can do in some contexts.

So:

• merg la poștă după prânz literally = I go to the post office after lunch
• natural meaning = I’m going / I’ll go to the post office after lunch

This sounds very normal in Romanian.

A more explicit future would also be possible, for example:

• voi merge la poștă după prânz

But the present tense is very common for plans.

Yes. la poștă means to the post office or at the post office, depending on context.

With a merge, it means direction:

• merg la poștă = I’m going to the post office

Romanian often uses la with places you go to:

• merg la magazin = I’m going to the shop
• merg la bancă = I’m going to the bank
• merg la poștă = I’m going to the post office

Because Romanian usually puts the definite article at the end of the noun, not before it as English does.

So:

• poștă can mean post office in this expression
• poșta = the post / the post office in other contexts

However, after some prepositions and in common place expressions, Romanian often uses the noun without the visible definite ending, even when English uses the.

That is why:

• la poștă = to the post office

This is just a normal Romanian way of expressing destination.

După prânz means after lunch.

• după = after
• prânz = lunch / midday meal

Depending on context, English might also translate it more loosely as in the afternoon, but the literal meaning is after lunch.

Examples:

• Ne vedem după prânz. = We’ll see each other after lunch.
• Lucrez după prânz. = I work after lunch.

Yes, Romanian word order is fairly flexible, but the version here is very natural and neutral:

Azi nu am nicio ședință, așa că merg la poștă după prânz.

You could move some parts around for emphasis, for example:

• Nu am nicio ședință azi...
• După prânz merg la poștă.

But the original order sounds smooth and normal in everyday Romanian.

A rough pronunciation is:

• ședință ≈ sheh-DEEN-tsuh

The special letters here are:

• ș = sh sound, like in ship
• ă = a short neutral vowel, similar to the a in sofa
• ț = ts sound, like in cats
• â does not appear in this word, but it is another Romanian vowel sound

So:

• poștă ≈ POSH-tuh
• ședință ≈ sheh-DEEN-tsuh

For a learner, getting ș and ț right makes a big difference in sounding clear.