Once you've downloaded that new software, you'll no doubt be anxious to take things out for a spin. The truth is that there is an amazing amount of software available for Linux. If trying out new things is exciting for you, I can pretty much guarantee that you won't get bored anytime soon.
Much of this software is available as source not surprising because the GPL (under which much of the Linux software out there is distributed) requires that you distribute source along with the programs. There are also open source projects that have no relation to the GNU projects that employ the license as a means of copyright. Then there are other open source projects that use BSD-style licensing, artistic licensing, postcard licensing, and many others; all distribute their programs in source format.
At first glance, this may appear to be nothing but a nuisance, yet source makes software portable. The number of platforms on which a single package can be compiled tends to be much higher because the applications can be built using your system at your operating system level with your libraries. It means that if you are running VendorX 8.1, you don't need to go looking for the VendorX 8.1 package.
Here's another reason: It takes developers time to provide packages compiled and ready to run on multiple platforms time they may not have, particularly if they are doing development without pay. Consequently, developers sometimes have source code available that is much more recent than the precompiled packages they offer. Why? Because they haven't found the time to build the packages for all those platforms. Here's a plus side you may not have considered: If at some point you decide that you want to try your hand at programming, open source means that you too can get into the game.