I would like to make my own music on my laptop with a program. However, I don't want to spend more than 100 euro once.
In your experience, which is the best and what is the price-performance ratio
I can recommend LMMS http://www.lmms.io/ This is the most comprehensive free DAW for Windows, Mac and Linux. The following standards are supported:
ZynAddSubFX
SoundFont2
VST (i)
LADSPA
GUS Patches (PatMan)
MIDI
FLP (Fruityloops Project) files
Here is the most extensive free MIDI sound font that can also be used in LMMS: https://github.com/...3%20GM.sf2
In addition, if you are using Windows, I recommend installing ASIO4ALL: http://www.asio4all.org/
With LMMS you can also use a MIDI keyboard to record melodies. The MIDI sound font is also used for this.