Hi a_hadjiyusoph and Welcome!
I recommend you look at the video walkthrough https://www.cantabilesoftware.com/videos to see if how complex it is to use and get the basics explained.
I have a feeling since you are a gamer you would need another program to use with it called Voicemeeter Pro. It helps you marry the Windows based audio from your game with VSTs you use for processing inside the Cantabile host. @terrybritton has made some great posts here and online videos for Voicemeter and an expert with Cantabile and he runs the 2 together with great success. I hope you get a good overview from the videos so you can see if it’s for you. It can be simple or complex so it can serve a wide group of people from complex large scale pro setups to simple home piano practice with a VST instrument.
Best,
Dave