I need some advice, I'd like to install office on a server I set up myself and then work on it using this whole suite. My question is: do I need to look for some server version of office and will others be able tu use such a solution while working on the server or not?
It's some idea:) There's no such server office, you'd have to use office for regular users. If I remember correctly, only one person can work remotely on one device just as one person can use Office
Instead of messing around, it would be much better to use Offica 365 and purchase the desired user limit. The work itself is quite similar, possibly even cheaper then maintaining a whle server 24/7.
I'd like to be able to cooperate with multiple users on one file.
It should pose no problem with the new office, there is some separate mode enablin cooperation on a single file but it needs to be saved in OneDrive. I strongly suggest that you do some reading on that :).