You install it then you click on the exe to open it. I suggest you to Install unity hub to so you can put all your unity projects in there.
Can you make for Android here how to add control https://youtu.be/nqGfC4NJHz8?si=ILN_BEcZt0SxRCuQ
Can you make for Android here how to add control https://youtu.be/nqGfC4NJHz8?si=ILN_BEcZt0SxRCuQ