As for tagging, at least on PC with the normal Lemmy-ui, when I type @LibertyLizard (or just @Liberty) and then do nothing, a menu pops up next to it with names which I can click on, and that will autofill the correct formatting to tag the user in their inbox.
Also @quercus may like you as a co-mod over on !nolawns, never hurts to ask ^^