Hi everyone, tysm!
In my opinion, everything you are trying to do can be implemented in Photoshop. In Photoshop, you can not only add a transparent background anywhere, but you can also cut out anything you don’t like from the picture. Just look for simple video tutorials on YouTube or find a convenient article via Google. There are a lot of ways to find a solution. I don’t really own Photoshop myself, but sometimes when I need to cut or change something in a photo or picture, I do everything with the help of guides. But not every guide is perfectly correct or simple. More recently, I accidentally came across a guide where the author explained how to use the chromatic aberration effect. As a result, I did not understand anything, although I spent a whole lot of time. Good luck!