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Jelly Comb keyboard on linux

So I have gotten a Jelly Comb keyboard as a gift for christmas. But the problem is, that according to the manufacturer, the keyboard is intended to be used on Windows. So now I have the following problems:

  1. If I press the Num Lock, the keyboard starts acting weird; most of the keys stop working, except for some numbers and some letters that act as numbers, while the Num Lock can't be turned off anymore. I tried using numlockx off , so that prevents Num Lock from turning on when i connect the keyboard to the computer, but I sometimes like to use numpad, which I cannot do atm.

  2. F1-F12 don't work. The F keys act also as multimedia keys by pressing the Fn, or at least that is how it should be. But in my case, pressing any of the F keys results in some random multimedia action (random as different from the one printed on the key), but when I press it using the Fn key, its effect just changes to some other multimedia action, again to something else than printed on the key.

  3. When I checked the output from xev, I saw that some of the keys have the same key code. For example F11 prints the same output as Fn+F4. Here is the example output:

KeyRelease event, serial 28, synthetic NO, window 0x3e00001, root 0x5c4, subw 0x0, time 2572602, (456,941), root:(521,1045), state 0x0, keycode 33 (keysym 0x70, p), same_screen YES, XLookupString gives 1 bytes: (70) "p" XFilterEvent returns: False KeymapNotify event, serial 28, synthetic NO, window 0x0, keys: 4294967236 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 KeymapNotify event, serial 28, synthetic NO, window 0x0, keys: 4294967236 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 

The first one is for some random letter, while the last two are from F11 and Fn+F4.

For additional info, I am running Ubuntu 20.04 with Gnome.

So my question is, if there is any way to use this keyboard normally on linux. I would imagine, that there is some way to 'tell' the OS to interpret the keyboard as Windows does, but I was unsuccessful in finding anything like that.