Если нужен быстрый самовывоз, можно выбрать пункт у метро.

Because нужен agrees with самовывоз, which is a masculine singular noun.

• самовывоз = masculine singular
• so the short-form adjective is нужен

Compare:

• нужен самовывоз — pickup is needed
• нужна доставка — delivery is needed
• нужно место — a place is needed
• нужны документы — documents are needed

So in Если нужен быстрый самовывоз..., the hidden idea is basically If quick pickup is needed or If you need quick pickup.

Russian often leaves out the person when it is understood from context or when the statement is meant to be general.

So:

• Если нужен быстрый самовывоз... literally feels like If quick pickup is needed...
• but in natural English it usually means If you need quick pickup...

You could make the person explicit:

• Если вам нужен быстрый самовывоз... — If you need quick pickup...

The version without вам is more compact and common in notices, websites, instructions, and customer-service language.

Because it describes самовывоз, which is the grammatical subject of the phrase нужен быстрый самовывоз.

In this structure:

• самовывоз is nominative
• быстрый agrees with it, so it is also nominative masculine singular
• нужен also agrees with it

So the whole chunk is:

• быстрый самовывоз — quick pickup
• нужен быстрый самовывоз — quick pickup is needed

Самовывоз means self-pickup, that is, the customer collects the order themselves instead of having it delivered.

It is formed from:

• само- = self-
• вывоз = removal / taking out / carrying away

In everyday commerce, самовывоз is the standard word for pickup or collection of an order.

Common examples:

• доставка или самовывоз — delivery or pickup
• заказать с самовывозом — order for pickup

This is another common impersonal Russian construction.

можно means:

• it is possible
• one can
• you can

So:

• можно выбрать пункт у метро = you can choose a pickup point near the metro

Russian often uses this kind of impersonal wording in instructions and general statements instead of saying вы можете.

Compare:

• можно выбрать — you can choose / it is possible to choose
• вы можете выбрать — you can choose

Both are correct, but можно sounds especially natural in neutral informational text.

Выбрать is perfective, and here that makes sense because it refers to making one complete choice.

• выбрать = to choose, to make a selection
• выбирать = to be choosing, to choose repeatedly, or to focus on the process

In this sentence, the idea is:

• if quick pickup is needed, you can choose a point near the metro

That is a single completed action, so perfective выбрать is natural.

If you used выбирать, it would sound more like discussing the process or a habitual action.

Here пункт means a pickup point, collection point, or service point.

In shopping and delivery contexts, пункт often appears in phrases like:

• пункт выдачи — pickup point / collection point
• пункт самовывоза — self-pickup point

In the sentence, пункт is shortened because the context already makes it clear that this is a place where you can pick up an order.

So:

• выбрать пункт у метро = choose a pickup point near the metro

Yes, у метро means by the metro, near the metro, or next to the metro.

The preposition у often means by, at, or near when talking about location:

• у дома — by the house
• у входа — by the entrance
• у метро — by the metro

In practice, у метро usually means near a metro station, not literally inside the subway system.

It is a very common everyday way to describe a convenient location.

Because метро is an indeclinable noun in Russian.

Normally, у requires the genitive case:

• у дома
• у станции

But метро keeps the same form in all cases:

• у метро
• к метро
• в метро

This is something learners simply have to remember: some borrowed nouns, including метро, do not decline.

Yes, absolutely. That version is fully correct and slightly more explicit.

Compare:

• Если нужен быстрый самовывоз, можно выбрать пункт у метро.

  • more compact
  • more impersonal
  • common in website or service language

• Если вам нужен быстрый самовывоз, вы можете выбрать пункт у метро.

  • more explicit
  • directly addresses the customer
  • slightly more conversational

Russian often prefers the shorter version in ads, interfaces, and informational text.

The word order is natural, but Russian word order is fairly flexible.

The given sentence:

• Если нужен быстрый самовывоз, можно выбрать пункт у метро.

This sounds smooth and neutral for an informational message.

You might also see:

• Если вам нужен быстрый самовывоз, можно выбрать пункт у метро.
• Можно выбрать пункт у метро, если нужен быстрый самовывоз.

The core meaning stays the same, but changing the order changes the flow and emphasis a little.

In the original, the condition comes first:

• If quick pickup is needed...

Then the recommended option:

• ...you can choose a point near the metro.

It is not a completely fixed idiom, but it is a very common collocation in shopping and delivery contexts.

You will often see:

• быстрый самовывоз — quick pickup
• удобный самовывоз — convenient pickup
• бесплатный самовывоз — free pickup

So even though the phrase is grammatically regular, it is also very natural as a standard service description.