Hi @ejgaido, to get you started with using the Leap Motion Controller I recommend having a look at our Leap Motion Gallery which hosts a a selection of different apps for you to play with.
The majority of our Desktop apps also use our older V2 hand tracking SDK which you will need to download and install from here and if you are using Windows 10 then you will also need to follow these instructions to manually apply a hotfix to resolve a compatibility issue caused but a changed in Windows 10 since we released this version of the SDK. Please ensure that you uninstall any other versions of our hand tracking software first as this can cause conflicts if left on your PC.
In terms of what you can use our hand tracking with, some examples are; VSeeFace, Luppet or Animaze if you are into VTubing, DCS World if flight sims are your thing or MidiPaw to use hand gestures to control music.
If you wish to develop with the controller I would recommend having a look at our developer site here for more information on the options available for developers. There is also a community built Steam VR driver available here which allows you to emulate controllers in Steam VR using our hand tracking.