Learn Hardcore Indonesian: Saya menulis catatan ringkas sesudah rapat.

Past/completed: Saya sudah menulis..., or add a time word: kemarin/tadi.
Progressive: Saya sedang menulis....
Future: Saya akan menulis... or add nanti.
Habitual: leave it bare: Saya menulis....

Is sesudah the same as setelah? What about habis/sehabis and usai/seusai?

All mean “after,” with register nuances:

setelah: very common, neutral.
sesudah: equally correct; slightly more formal in some ears.
sehabis/habis: casual/colloquial (e.g., Habis rapat, ...).
seusai/usai: formal/literary or newsy. You can replace sesudah with setelah here without changing the meaning.

Can I move sesudah rapat to the front?

Yes. Sesudah rapat, saya menulis catatan ringkas. Fronting time phrases is common; use a comma after the fronted phrase.

Do I need di or pada before rapat?

No. Sesudah already functions like “after.” Say sesudah rapat, not sesudah di/pada rapat. Use di/pada only when you mean “at/in the meeting”: di rapat, pada rapat.

Do I have to use saya, or can I say aku, or drop it?

saya: neutral/polite; safe almost everywhere.
aku: informal/intimate.
Subject drop: possible if context is clear, but Menulis catatan ringkas sesudah rapat can sound like an instruction. For a clear instruction, use the imperative: Tulis(lah) catatan ringkas sesudah rapat.
Very informal Jakarta slang: gue (I), lu/lo (you).

Should it be menulis catatan, mencatat, or membuat catatan?

All work, with nuances:

menulis catatan: write notes; neutral.
mencatat: take note(s), jot down (often during or right after an event).
membuat catatan: make notes; a very common collocation. For “write the minutes,” use menulis notulen or membuat risalah rapat.

What’s the difference between menulis, menuliskan, and menulisi?

menulis: to write (basic).
menuliskan (-kan): to write something down (often for someone), can take an indirect object: menuliskan catatan untuk atasan.
menulisi (-i): to write on/cover a surface: menulisi dinding. In this sentence, menulis is the most natural.

Does catatan ringkas mean “a note” or “notes”? How do I mark plural or singular?

By default it’s unspecified: could be one note or several. To be explicit:

One: sebuah/satu catatan ringkas.
Several: beberapa catatan ringkas or catatan-catatan ringkas (reduplication for emphasis).

Is catatan ringkas the same as ringkasan?

Not exactly:

catatan ringkas: concise notes (brief points).
ringkasan: a summary/abstract of something. After a meeting you might write a ringkasan rapat (summary) or catatan ringkas (brief notes), depending on the goal.

Is ringkas the same as singkat or pendek?

ringkas: concise/compact (avoids unnecessary detail).
singkat: brief/short in length or duration; catatan singkat is also common.
pendek: short in physical length/height; less natural for notes.

How do I say “the meeting” specifically?

Indonesian doesn’t require “the.” Add a determiner or context:

rapat itu (that/the meeting in question)
rapat tadi/kemarin/siang ini, etc. Example: Saya menulis catatan ringkas sesudah rapat itu.

What’s the difference between rapat and pertemuan (and the borrowed meeting)?

rapat: a formal/organizational meeting (work, committee).
pertemuan: any meeting/encounter; broader, can be less formal.
meeting: English loan heard in offices; in standard Indonesian, prefer rapat.

Can I use the passive voice?

Yes:

General passive: Catatan ringkas ditulis sesudah rapat.
With the actor: Catatan ringkas ditulis oleh saya sesudah rapat.
Object-fronting (colloquial active): Catatan ringkas saya tulis sesudah rapat.

Do I need yang before ringkas (e.g., catatan yang ringkas)?

Not necessary. Catatan ringkas is the normal noun + adjective order. Use yang to emphasize or when the modifier is longer: catatan yang sangat ringkas, catatan yang saya tulis sesudah rapat.

Is saya capitalized like English “I”?

No. saya is lowercase unless it begins a sentence. Indonesian doesn’t capitalize pronouns for respect.