Pankki on lähellä, joten menen sinne nyt.

Lähellä is commonly used as an adverb meaning nearby / close:

• Pankki on lähellä. = The bank is nearby.

It can also behave like a postposition in structures such as:

• Pankki on koulun lähellä. = The bank is near the school.
  Here lähellä comes after its “reference word,” which is in the genitive (koulun).

Finnish distinguishes location vs. movement:

• siellä = there (static location, where something is)
• sinne = to there (direction, where you’re going)

So:

• Pankki on lähellä (location/description)
• menen sinne = I go there (movement toward a place)

Sinne is a directional “there”-word. Historically it’s the illative-type form of se (it/that), but in modern Finnish it’s best learned as part of the set:

• täällä (here), tuolla (over there), siellä (there)
• tänne (to here), tuonne (to over there), sinne (to there)
• täältä (from here), tuolta (from over there), sieltä (from there)

It doesn’t behave exactly like a normal noun you decline; it’s more like a fixed pronoun/adverb form.

Joten means so / therefore, introducing a result:

• Pankki on lähellä, joten menen sinne nyt. = The bank is near, so I’m going there now.

Common alternatives (with slightly different nuance):

• niin = so/then (often more conversational)
• siksi = therefore / for that reason (often pairs with että or stands alone) Example:
• Pankki on lähellä, niin menen sinne nyt. (more casual)
• Pankki on lähellä, siksi menen sinne nyt. (a bit more “for that reason”)

In Finnish, you typically put a comma between two clauses when the latter is introduced by a conjunction like joten:

• [Clause 1], joten [Clause 2].

Here you have:

• Pankki on lähellä (clause)
• joten menen sinne nyt (clause)

So the comma is standard punctuation.

Both are possible; word order often reflects emphasis:

• Menen sinne nyt. Neutral: I’m going there now.
• Nyt menen sinne. Emphasizes now (maybe “right now / at this point”).
• Sinne menen nyt. Emphasizes there (that’s where I’m going now).

Finnish word order is flexible, but the “most important/newest” info often gets moved toward the front for emphasis.

• ä is like the vowel in cat for many English speakers (but purer/shorter), not like ay.
• lähellä is roughly LEH-hel-lä, with:
  • stress on the first syllable (LÄ-),
  • a clearly doubled ll sound (held a bit longer than a single l).

Also note the double consonant in pankki: the kk is held longer than a single k, which can affect meaning in Finnish.