How do you decide what you need?
Your no longer in the "windows world" with Linux. With windows, you got just enough of a system to get the computer going the Microsoft way. Any applications to do any real work would be supplied free along with your hardware like the scanner, webcam, modem, or sound card. These additional apps supplied with your devices would be individually installed. Additionally, you could purchase needed applications from Microsoft or any one of a number of venders or could download free or trials from the net. As such, windows has no concept of application management. Until you actually install an application windows has no way of knowing about it so management is merely blind install, or remove. When you do install these Windows apps for your hardware, the total sum of information available for the app is contained in a help file that accompanies the app. Details of what libraries and support routines are included is seldom documented.
Linux incorporates RPM (Red hat Package Management) ,or deb (debian packager) and now repositories whereby, each compressed package contains a full description of what it does and what additional packages are needed in order to use the application. Every time you obtain a new distribution of Linux, new respository or download more rpms or debs, the list of packages available is updated. As you add or remove packages you can see exactly what is on your system and what isn't. Also it tells you when a package is available which is an upgrade to something on your system. As you browse through the individual packages, you see a full description of what each package has or does. So as you can see, you can decide whether or not you want to try a new package before you even install it. With such powerful application management, it is far easier to tell when there may be a conflict before you try. As you work with the system, you can also easily add or remove applications without any harmful effects and this allows you to try different apps until you have just what you want.