Snapping doesn't work, I've enabled it in Preferences, but nothing seems to work. I'd be grateful you could point out if I made something wrong.

You need to enable snapping in the upper right corner:

I don't have this function in the upper right corner.

Please:

1. Describe your OS (your computer's Operating System: Mac/Windows/Linux/etc. & version).
2. Describe if Inkscape was newly installed, or upgraded from an earlier version.
3. Describe the version of Inkscape and the installer you used (the file you downloaded from the web: .msi/.exe/.zip/appimage/other, PPA/Snap/Flatpak, dmg/other ). 
4. Describe any special hardware being used, like tablet/stylus, external drives or multiple monitors.
5. Describe any helper/assistive programs or keyboard modifiers (macros, languages, etc.).

1. Windows 11

2. Newly installed 2 months ago.

3. inkscape-1.4_2024-10-11_86a8ad7-x64

4. No

5. No

Installer?