The first step is
- Download the File for windows.
Your first direction is to download the latest sdk tools: (link supplied).
I have attached a file showing that linked-to page.
I click on the blue-colored Windows option "sdk-tools-windows-3859397.zip".
Nothing happens (not really a link?)
Maybe, something is wrong with my computer?
Create the folder C:\android-sdk
and extract the tools-folder from the downloaded windows sdk to C:\android-sdk
After that you´ll have C:\android-sdk\tools\*.*
Switch to SdkManager.jar. Start it again. Now you define the path for the needed sdkmanager.bat.
The file is in C:\android-sdk\tools\bin\sdkmanager.bat
Select it.