what windows is best ? or what linux is best ?
Any, I don't think it has any significant correlation.
i think there are 2 way's to install, laz4android and laztoapk ?? am i right ?
For those who wants shortcut, I think so. 3rd way is for those who want to configure everything manually (downloading Android SDK, NDK, setup path, create symlinks, etc.)
what is the best / easyest way to install a working IDE ?
Choose one, we currently don't have both easiest and best.
is it more easy to use real hardware or emulating ?
The same for me. Emulator runs fast on Linux, while pushing to real hardware is only an option different when calling adb push.