In my experience, I can’t see any difference in speed between different launchers. But just try it out, install a few and then delete the ones you don’t like.

The interface design is based on how iOS works, for example to move an icon on your phone long press one of the icons and wait till they all go wiggling and then drag the icon to where you want to have it.

In case you don’t like the interface, you can also simply install a different launcher and set it as the default start app. There really is a lot to choose from: https://android.izzysoft.de/applists/category/named/tools_launcher?lang=en