Note: When you load there will be a momentary flicker on the screen as your verification link appears on screen. In retrospect, and per the Mastodon docs, it’s probably possible to put this entirely into the header. But I didn’t want to wear out my welcome with Mastodon trying different things.
Instead of <a> you can use a <link/> element, this way it’s totally invisible
Also note that putting the verification link in the wiki itself will only work temporarily, up until the wiki reach 1MB. I suggest using a separate html file with iframe (in case js is deactivated) + a js redirect, see Easy way to fix mastodon verification issue (for wiki over 1MB)
That’s more than enough to for a landing site where you introduce yourself, make news posts, and redirect people to other projects you may have. While researching links for links.tiddlywiki.org I found lots of sites on tiddlyspot/tiddlyhost that have only 3 or 4 tiddlers, and had been that way for ages.