Meine Nachbarin bringt eine neue Glühbirne mit, und ich ziehe die Jalousie erst am Abend wieder herunter.

Because mitbringen is a separable verb.

• Full infinitive: mitbringen = to bring along / to bring with one
• In a normal main clause, the prefix mit- moves to the end:
  • Meine Nachbarin bringt eine neue Glühbirne mit.

This is very common in German:

• ankommen → Er kommt heute an.
• einkaufen → Ich kaufe später ein.
• mitbringen → Sie bringt Brot mit.

But in the infinitive or with modal verbs, it stays together:

• Sie will eine Glühbirne mitbringen.
• Es ist gut, eine Glühbirne mitzubringen.

For the same reason: herunterziehen is also a separable verb.

• herunterziehen = to pull down
• In a main clause:
  • Ich ziehe die Jalousie herunter.

So the finite verb ziehe goes in second position, and the prefix herunter goes to the end.

You can think of the clause structure like this:

• ich = subject
• ziehe = conjugated verb
• die Jalousie = object
• erst am Abend wieder = adverbial information
• herunter = separated prefix

Because Glühbirne is feminine: die Glühbirne.

Here it is the direct object of bringt, so it is in the accusative case. For feminine nouns:

• nominative: eine Glühbirne
• accusative: eine Glühbirne

So the article stays eine.

The adjective ending in eine neue Glühbirne is -e, because after ein-/eine-words, a feminine accusative adjective takes -e.

Compare:

• eine neue Glühbirne — feminine accusative
• ein neues Buch — neuter accusative
• einen neuen Tisch — masculine accusative

Because Jalousie is a feminine noun in German.

• nominative: die Jalousie
• accusative: die Jalousie

In this sentence, it is the direct object of ziehe, so it is accusative, but for feminine nouns the article is still die.

A learner might expect a change in the article, but unlike masculine nouns, feminine accusative looks the same as feminine nominative:

• die Jalousie → nominative
• die Jalousie → accusative

Compare with a masculine noun:

• nominative: der Tisch
• accusative: den Tisch

Here, erst does not mean first.

In this sentence, erst am Abend means:

• not until the evening
• only in the evening

So:

• ich ziehe die Jalousie erst am Abend wieder herunter = I don’t pull the blind down again until the evening

This use of erst is very common in German.

Examples:

• Ich komme erst morgen. = I’m not coming until tomorrow.
• Er hat erst um zehn Uhr angefangen. = He only started at ten o’clock.

So here, erst adds the idea of lateness or delay.

Wieder usually means again.

In this sentence, it suggests that the blind had been down before, then was up, and later it is pulled down again.

So:

• wieder herunterziehen = pull down again

Depending on context, wieder can sometimes feel like back in English:

• Mach die Tür wieder zu. = Close the door again / close the door back up.

Here, wieder naturally goes with the whole action of herunterziehen.

German often uses an with parts of the day, and an dem contracts to am.

So:

• an dem Abend → am Abend

This is the normal idiomatic expression for in the evening / in the evening time.

Common time expressions include:

• am Morgen = in the morning
• am Vormittag = in the late morning
• am Nachmittag = in the afternoon
• am Abend = in the evening

But note that in der Nacht is more common than am Nacht.

So erst am Abend is just the standard way to say not until the evening.

German main clauses normally put the conjugated verb in second position.

So in the second clause:

• ich = position 1
• ziehe = position 2

Then come the other elements, and the separable prefix goes to the end:

• die Jalousie
• erst am Abend
• wieder
• herunter

A very important rule is:

• finite verb in second position
• separable prefix at the end

The middle part can be somewhat flexible, especially with adverbs, but this version sounds natural and clear.

Because the subject is Meine Nachbarin, which is third person singular: she.

So the verb bringen is conjugated as:

• ich bringe
• du bringst
• er/sie/es bringt
• wir bringen
• ihr bringt
• sie/Sie bringen

Since meine Nachbarin = she, the correct form is bringt.

The same applies in the second clause:

• ich ziehe because the subject is ich

In German, when two clauses are joined by und, each clause normally keeps its own subject if needed for clarity.

So:

• Meine Nachbarin bringt eine neue Glühbirne mit
• und ich ziehe die Jalousie erst am Abend wieder herunter

The second clause has a different subject:

• first clause: meine Nachbarin
• second clause: ich

So German must say und ich.

If the subject stayed the same, German could sometimes omit repeating it less often in certain styles, but here the change of subject makes ich necessary.

Usually die Jalousie means a blind, especially a window blind with slats or an exterior rolling blind, depending on region and context.

It is not usually a curtain:

• der Vorhang = curtain

And it is not always exactly the same as an English shutter, though in some contexts the object may function similarly.

In this sentence, die Jalousie herunterziehen most naturally means:

• to pull the blind down

So if you are translating into natural English, blind is usually the best choice here.