Every Fediverse content looks a little different, depending on which access software or app you use to view it. It seems that there are also Lemmy apps that display hashtags a little too exaggerated, while in others and in the web-gui it is ok. (in an earlier version of the guide it also said that you shouldn’t use hashtags/tags esp. in the headline because it didn’t work properly back then).

But maybe I should include a note in the instructions that hashtags should be used sparingly or placed at the end?

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