Packing

To Do Before Departure

Upload a copy of your passport, visa, admission letter, and original certificates to Google drive or sent them to your parents
Check the weather before departure. Is it cold (do I need to wear thermals)? Will it rain?
When booking your flight, make use of the student discounts available like Qatar Student Discount or Turkish Student Discount

For the most part, I don't use that much thermal undershirt (as my jacket is thick enough), I do use thermal pants a lot.
Most people will probably survive without a winter boot, I never use mind except when I go out to play with snow.
Gloves are nice but often very unpractical, you can't really open your phone with them, if you really need them I usually use the think wool ones
Hoodies are your best friend, you can use them if it is cold indoor, otherwise a thin fleece jacket will do
Regular sock suffice, I almost never use those thick winter socks

FFP2 Masks, lots of em only FFP2 are currently allowed in many areas within Germany
Sleeping bags, if you are still going to move from place to place

Passport, Admission Letter (Studienplatzzusagge / Zulassung) and Original Copies (if you bring any) (the rest can go into your checked in luggage)
At least 1 day worth of clothing if not 2 - 3 day (baggage gets lost all the time)
Hand cream and lip balm (it is really dry in Febuary)
Pocket tissue (it's usually cold so you might have a bit of runny nose)
If it is going to rain upon arrival, a tiny umbrella would be nice, otherwise just buy one hear (its around 3 Euros)

Body pillow (you cannot get them in Germany)
Some basic medicine (paracetamol, promag, diatab, stop cold, antimo, fix44)
Powerbank
Earplugs, if you cannot sleep with someone snoring, you could also buy them here Ohropax brand works best for me.

Rice Cooker, just buy one on Amazon.de
Bedding, the bed size and pillow size in Germany is diffrent (single beds are 80x200 and pillows are 80x40 or 80x80), just grab them at IKEA
Soap and shampoos, Germany is really dry compared to Indonesia, using soaps from Indonesia will make your skin break, just get them at Rossman or DM

Long sleeve which are quite thick are best for winters, it usually suffice to use one layer and a jacket on top of it (in Berlin at least)
Summer is hot, so lot's of T-shirts!
One formal clothing for graduation events and so on